Geometry

More Specific Topics in Geometry

Popular Tutorials in Geometry

What are the Endpoints of a Line Segment?

A math term can really tell you a lot about the thing it's describing. Take the term 'endpoints'. The endpoints of a line segment are just the 'points' located at the 'ends' of the line segment! That's an informative name! Watch this tutorial to learn about endpoints of a line segment.
What is a Degree?

Circles can't run a temperature, but they are an important part of degrees! Watch this tutorial to learn what a degree is and how it relates to a circle.
What are Intersecting Lines?

When two roads cross, it's called an intersection! What about if two lines cross? Is that called an intersection too? This tutorial has the answer!
How Do You Make a Figure Larger Using a Dilation?

Dilation allows you to shrink or enlarge the size of a figure without changing its shape. In this tutorial, follow along as you see how dilate a figure by a given scale factor. Check it out!
What is a Dilation?

When someone's eyes dilate, their pupils get bigger or smaller, but they always stay the same shape. Dilation in math is very similar. When you dilate a figure, you change the size of the figure without changing its shape. This tutorial introduces you to dilation. Take a look!
How Do You Use Complementary Angles to Find a Missing Angle?

If two angles are complementary, that means that they add up to 90 degrees. This is very useful knowledge if you have a figure with complementary angles and you know the measurement of one of those angles. In this tutorial, see how to use what you know about complementary angles to find a missing angle measurement!
How Do You Use Supplementary Angles to Find a Missing Angle?

If angles combine to form a straight angle, then those angles are called supplementary. In this tutorial, you'll see how to use your knowledge of supplementary angles to set up an equation and solve for a missing angle measurement. Take a look!
How Do You Classify Quadrilaterals?

Got a figure with four sides? Then you have a quadrilateral! But there are many special types of quadrilateral. Follow along as this tutorial shows you how to figure out the possible names for a given quadrilateral!
How Do You Find the Measures of Exterior Angles of a Polygon if You Know the Interior Angles?

Trying to figure out the measurements of the exterior angles of a polygon? Got the interior angle measurements? If so, then you can set up equations using those interior angles and solve to find you exterior angles. This tutorial shows you how!
How Do You Find Measures of Missing Exterior Angles?

Looking for the missing measurements of exterior angles in a polygon? If you already have the other exterior angle measurements, you can use those to help you find your missing measurements! How? Remember, the sum of the exterior angles of ANY polygon is always 360 degrees. Check out this tutorial and see how to use this knowledge to find those missing measurements!
How Do You Use a Graph to Reflect a Figure Over the Y-Axis?

Reflecting a figure over the y-axis can be a little tricky, unless you have a plan. In this tutorial, see how to use the graph of a figure to perform the reflection. Check it out!
How Do You Use Coordinates to Reflect a Figure Over the X-Axis?

Want to see how to reflect a figure over the x-axis? Then this tutorial was made for you! In this tutorial, you'll see how to use coordinates from the original figure to reflect the figure over the x-axis. Take a look!
How Do You Use Coordinates to Reflect a Figure Over the Y-Axis?

Want to see how to reflect a figure over the y-axis? Then this tutorial was made for you! In this tutorial, you'll see how to use coordinates from the original figure to reflect the figure over the y-axis. Take a look!
How Do You Use a Graph to Reflect a Figure Over the X-Axis?

Reflecting a figure over the x-axis can be a little tricky, unless you have a plan. In this tutorial, see how to use the graph of a figure to perform the reflection. Check it out!
How Do You Classify Triangles?

Being able to classify triangles is an important skill. If you know what kind of triangle you're looking at, it's much easier to figure out how to solve for various sides and angles. Practice classifying triangles with this tutorial!
How Do You Find a Missing Angle in a Triangle?

Trying to find a missing interior angle measurement in a triangle? Already know the other two interior angle measurements? Then you're set! Just remember that the interior angles of a triangle ALWAYS add up to 180 degrees. This tutorial shows you how to put this knowledge into an equation and solve to find that missing measurement!
How Do You Find Missing Angles in an Isosceles Triangle?

Trying to find a missing interior angle measurement in a triangle? See if you're working with a special type of triangle such as an equilateral or isosceles triangle. If you are, that knowledge can help you. In this tutorial, see how identifying your triangle first can be very helpful in solving for that missing measurement. Take a look!
How Do You Find Missing Angles in a Triangle With Variables?

Looking for the measurements of the interior angles of a given triangle? The Triangle Sum theorem might help. This theorem states that the interior angles of a triangle ALWAYS add up to 180 degrees! This tutorial shows you how to use that information to find those interior angle measurements.
How Do You Find the Angles in a Triangle if You Have a Ratio of Their Measures?

Looking for the measurements of the interior angles of a triangle? Then check out this tutorial! You'll see how to use a given ratio of the interior angles and the Triangle Sum theorem to find those missing measurements. Take a look!
How Do You Find Missing Angles in a Quadrilateral With Variables?

Trying to figure out the measurements of the interior angles of a polygon? Then check out this tutorial! This tutorial shows you how to create an equation and solve it to find those missing measurements. Take a look!
How Do You Find a Missing Angle in a Quadrilateral?

Trying to figure out the measurements of the interior angles of a polygon? Then check out this tutorial! This tutorial shows you how to create an equation and solve it to find those missing measurements. Take a look!
How Do You Identify Corresponding Parts in Congruent Triangles?

When you have two congruent figures, that means that corresponding sides and corresponding angles are congruent. Get some practice identifying corresponding sides and angles by following along with this tutorial!
How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?

Trying to find a missing interior angle measurement in a triangle? See if you're working with a special type of triangle such as an equilateral or isosceles triangle. If you are, that knowledge can help you. In this tutorial, see how identifying your triangle first can be very helpful in solving for that missing measurement. Take a look!
How Do You Find a Missing Angle in a Right Triangle?

Trying to find a missing interior angle measurement in a triangle? See if you're working with a special type of triangle such as an equilateral or isosceles triangle. If you are, that knowledge can help you. In this tutorial, see how identifying your triangle first can be very helpful in solving for that missing measurement. Take a look!
How Do You Find Missing Angles in a Transversal Diagram?

Got a diagram of a transversal intersecting parallel lines? Trying to figure out all the angle measurements? Take a look at this tutorial, and you'll see how find all the missing angle measurements by identifying vertical, corresponding, adjacent, and alternate exterior angles!
How Do You Find a Value for x that Makes Two Lines Parallel?

Got a transversal intersecting two lines? Trying to figure out if those lines are parallel? You could test to see if corresponding angles are congruent. This tutorial shows you how!
How Do You Find Angle Measures for Adjacent Angles?

Learning how to find missing angle measurements is a very useful skill. In this tutorial, get some practice finding missing angle measurements by first creating an equation. Take a look!
How Do You Rotate a Figure 90 Degrees Clockwise Around the Origin?

Rotating a figure about the origin can be a little tricky, but this tutorial can help! This tutorial shows you how to rotate coordinates from the original figure about the origin. Then, simply connect the points to create the new figure. See this process in action by watching this tutorial!
How Do You Rotate a Figure 180 Degrees Around the Origin?

Rotating a figure about the origin can be a little tricky, but this tutorial can help! This tutorial shows you how to rotate coordinates from the original figure about the origin. Then, simply connect the points to create the new figure. See this process in action by watching this tutorial!
How Do You Rotate a Figure 270 Degrees Clockwise Around the Origin?

Rotating a figure about the origin can be a little tricky, but this tutorial can help! This tutorial shows you how to rotate coordinates from the original figure about the origin. Then, simply connect the points to create the new figure. See this process in action by watching this tutorial!
How Do You Use a Graph to Translate a Figure Horizontally?

Translating a figure on the coordinate plane is easier than you might think! In this tutorial, see how to use the graph of the original figure to perform the translation. Take a look!
How Do You Use a Graph to Translate a Figure Vertically?

Translating a figure on the coordinate plane is easier than you might think! In this tutorial, see how to use the graph of the original figure to perform the translation. Take a look!
How Do You Use a Graph to Translate a Figure Diagonally?

Performing multiple translations on the graph of a figure is easier than you might think! In this tutorial, see how to use the graph of the original figure to perform each translation in order to get the graph of the new figure. Check it out!
How Do You Use Coordinates to Translate a Figure Horizontally?

Translating a figure on the coordinate plane is easier than you might think! This tutorial shows you how to translate coordinates from the original figure. Then, simply connect the points to create your new figure. This tutorial shows you how!
How Do You Use Coordinates to Translate a Figure Vertically?

Translating a figure on the coordinate plane is easier than you might think! This tutorial shows you how to translate coordinates from the original figure. Then, simply connect the points to create your new figure. This tutorial shows you how!
What is a Rectangle?

A rectangle is one of the many fundamental shapes you'll see in math. Rectangles have special properties that can be very useful in helping you solve a problem. This tutorial introduces you to rectangles and explains their interesting qualities!
What is a Triangle?

You can't learn everything about math without dealing with triangles. Did you know that there are different types of triangles? Check out this tutorial, and learn about triangles and their different types!
What is a Parallelogram?

A parallelogram is a special type of quadrilateral with some special properties. In this tutorial, take a look at parallelograms and learn what kinds of quadrilaterals can also be called parallelograms!
What is a Trapezoid?

A trapezoid is a special type of quadrilateral with some special properties. This tutorial introduces you to trapezoids and gives you a look at the special properties needed for a quadrilateral to be called a trapezoid. Check it out!
What is a Point?

A point is a fundamental building block of math. Without points, you couldn't make lines, planes, angles, or polygons. That also means that graphing would be impossible. Needless to say, learning about points is very important! That makes this tutorial a must see!
What is a Plane?

You can't learn everything about math without seeing planes. Did you know that there are rules for naming a plane? This tutorial introduces you to planes and shows you how to name them. Take a look!
What is a Line Segment?

A math term can really tell you a lot about the thing it's describing. Take the term line segment. A line segment is just part of a line! In this tutorial, learn about line segments, how to name them, and what the midpoint of a line segment is!
What is a Ray?

Rays are a very useful part of math. Two rays can create an angle. Multiple angles can create a polygon. Add another dimension, and you get three-dimensional solids! This tutorial introduces you to rays and shows you how to name them.
What is an Angle?

Angles are a fundamental building block for creating all sorts of shapes! In this tutorial, learn about how an angle is formed, how to name an angle, and how an angle is measured. Take a look!
What is a Polygon?

Got a closed figure with three or more sides? Then you have a polygon! In this tutorial, you'll learn about the properties of a polygon, see the names of the most popular polygons, and learn how to identify polygons. Check it out!
What are Acute, Obtuse, Right, and Straight Angles?

Did you know that there are different kinds of angles? Knowing how to identify these angles is an important part of solving many problems involving angles. Check out this tutorial and learn about the different kinds of angles!
What are Complementary Angles?

Do complementary angles always have something nice to say? Maybe. One thing complementary angles always do is add up to 90 degrees. In this tutorial, learn about complementary angles and see how to use this knowledge to solve a problem involving these special types of angles!
What are Supplementary Angles?

Knowing about supplementary angles can be very useful in solving for missing angle measurements. This tutorial introduces you to supplementary angles and shows you how to use them to solve for a missing angle measurement. Take a look!
What are Vertical Angles?

Vertical angles have a very special quality. They are always congruent to one another! Check out this tutorial to learn about and see how to identify vertical angles!
What Does Congruent Mean?

If two figures have the same size and shape, then they are congruent. The term congruent is often used to describe figures like this. In this tutorial, take a look at the term congruent!
What are Parallel Lines?

Lines that are parallel have a very special quality. Without this quality, these lines are not parallel. In this tutorial, take a look at parallel lines and see how they are different from any other kind of lines!
What are Perpendicular Lines?

Perpendicular lines have a special property. The angles formed by perpendicular lines will always be the same. Check out this tutorial to learn about perpendicular lines and see a cool trick involving these special lines!
What are Skew Lines?

Ever heard of skew lines? They're pretty cool! Take a look at this tutorial and you'll be introduced to skew lines.
What is a Transversal?

Ever heard of a transversal? It's not as confusing as the term sounds. This tutorial will introduce you to transversals and show you the neat things that happen when a transversal meets two parallel lines. Take a look!
What are Acute, Obtuse, and Right Triangles?

Did you know that there are different kinds of triangles? Knowing how to identify these triangles is an important part of solving many problems involving these triangles. Check out this tutorial and learn about some of the different kinds of triangles!
What is a Quadrilateral?

The term quadrilateral is a really fancy sounding name for a certain kind of polygon. Did you know that there are special types of quadrilaterals? Watch this tutorial to learn about quadrilaterals and their special types.
What is a Square?

A square is one of the many fundamental shapes youâ€™ll see in math. Squares have special properties that can be very useful in helping you solve a problem. This tutorial introduces you to squares and explains their interesting qualities!
What is a Rhombus?

A rhombus is a special kind of quadrilateral. Knowing about the special properties of a rhombus is important to identifying and using these special polygons. This tutorial introduces you to the rhombus and explains its unique qualities. Take a look!
What are Interior and Exterior Angles of a Polygon?

Sometimes a math term can really tell you a lot about the thing it's describing. Think about the terms interior angle and exterior angle. Can you guess where each is located on a polygon? Take a look at this tutorial to find the answer and learn about interior and exterior angles!
What is a Regular Polygon?

Polygons come in all different shapes and sizes. Some polygons have special properties that allow them to be called regular polygons. In this tutorial, you'll see what it takes for a polygon to be given this special name. Check it out!
What are Equilateral, Isosceles, and Scalene Triangles?

Did you know that there are different kinds of triangles? Knowing how to identify these triangles is an important part of solving many problems involving these triangles. Check out this tutorial and learn about some of the different kinds of triangles!
What is a Reflection?

When you look in the mirror, you see your reflection. In math, you can create mirror images of figures by reflecting them over a given line. This tutorial introduces you to reflections and shows you some examples of reflections. Take a look!
What is a Rotation?

Ever turned a door handle? You were performing a rotation! In math, rotations are just the same! Check out this tutorial to learn about rotations.
What is a Translation?

Ever slide something across a table? If so, then you have performed a translation! In this tutorial, learn the definition of translation and see some really neat examples. Take a look!
What is a Line of Reflection?

Just about everything in math has a name! Did you know that the line you reflect a figure over has a special name? It's called the line of reflection! Watch this tutorial and learn about the line of reflection.
What is a Transformation?

Transformations can be really fun! They allow you to change or move a figure. In this tutorial, learn about all the different kinds of transformations!
What is an Image?

Just about everything in math has a name! Did you know that when you're dealing with transformations, the new figure you get is called an image? Check out this tutorial and learn about this math term!
What is a Tessellation?

The term tessellation can seem pretty scary, but tessellations are really cool! Youâ€™ve probably seen tons of tessellations before without even knowing it! In this tutorial, youâ€™ll learn about tessellations and see some of their interesting qualities.
What is Rotational Symmetry?

Ever notice that some shapes look the same after you rotate them? These shapes have a property called rotational symmetry! Check out this tutorial to learn more.
What Properties of a Figure Stay the Same After a Translation?

Get to know translations better with this tutorial. You'll learn what properties stay the same and what changes when you translate a figure.
How Do You Find the Sum of the Interior Angles of a Polygon?

Polygons have all kinds of neat properties! For example, if you know the number of sides of a polygon, you can figure out the sum of the interior angles. That knowledge can be very useful when you're solving for a missing interior angle measurement. Check out this tutorial to learn how to find the sum of the interior angles of a polygon!
What is the Triangle Sum Theorem?

When you're dealing with triangles, the Triangle Sum theorem can be very useful in finding interior angle measurements. In this tutorial, learn how to find this helpful theorem!
Why Are the Angles of Equilateral Triangles Always Equal to 60°?

Did you know that the interior angles of an equilateral triangle will always measure the same, no matter the size of the equilateral triangle? In this tutorial, you'll see how to find the measurements of the interior angles of an equilateral triangle. Take a look!