Triangles

Popular Tutorials in Triangles

How Do You Find Missing Measurements of Similar Figures Using a Proportion?

Trying to find a missing measurement on similar figures? Make ratios from corresponding sides and set up a proportion! Solve the proportion to get your missing measurement. Figure out how to do all that by watching this tutorial!
What are Similar Figures?

Looking at two figures that are the same shape and have the same angle measurements? You have similar figures! Learn all about it in this tutorial!
What are Corresponding Parts in Similar Figures?

Identifying corresponding parts in similar figures isn't so bad, but you have to know what you're looking for. This tutorial does a great job of explaining the corresponding parts of similar figures! Take a look!
How Do You Find the Length of a Leg of a Right Triangle?

Finding the missing length of a side of a right triangle? If you have the other two side lengths, you can use the Pythagorean theorem to solve! Check out this tutorial and see how to use this really helpful theorem to find that missing side measurement!
How Do You Determine if a Triangle Is a Right Triangle if You Know its Sides?

Think your triangle is a right triangle? Want to be sure? If you have the length of each side, apply the Pythagorean theorem to the triangle. If you get a true statement when you simplify, then you do indeed have a right triangle! If you get a false statement, then you can be sure that your triangle is not a right triangle. Check out this tutorial and learn how use the Pythagorean theorem to see if a triangle is a right triangle!
What are the Legs and Hypotenuse of a Right Triangle?

Looking for some terminology used with right triangles? Then this tutorial was made for you! In this tutorial, you'll be introduced to the names for the different parts of a right triangle. Check it out!
What is the Pythagorean Theorem?

The Pythagorean theorem is a very popular theorem that shows a special relationship between the sides of a right triangle. In this tutorial, you'll get introduced to the Pythagorean theorem and see how it's used to solve for a missing length on a right triangle!
How Do You Find the Perimeter of a Shape?

Ever had someone come up to you on the street, hand you a shape, and ask you to find the perimeter of that shape? Watch this tutorial, and next time that happens you'll be ready!
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 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!
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 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 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 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 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!
How Do You Find a Missing Hypotenuse in a 45°-45°-90° Triangle?

Looking at a 45-45-90 triangle? Trying to find a missing side length? You could use the Pythagorean theorem, or you could use your knowledge of this special type of triangle to get that missing measurement. In this tutorial, see how to solve for a missing side length by using your knowledge of 45-45-90 triangles to find a scale factor and set up an equation to solve!
How Do You Find Missing Sides in a 30Â°-60Â°-90Â° Triangle?

Looking at a 30-60-90 triangle? Trying to find a missing side length? You could use the Pythagorean theorem, or you could use your knowledge of this special type of triangle to get that missing measurement. In this tutorial, see how to solve for a missing side length by using your knowledge of 30-60-90 triangles to find a scale factor and set up an equation to solve!
What is a 45Â°-45Â°-90Â° Triangle?

A 45-45-90 triangle is a special right triangle with some very special characteristics. If you have a 45-45-90 triangle, you can find a missing side length without using the Pythagorean theorem! Check out this tutorial to learn about 45-45-90 triangles!
What is a 30-60-90 Degree Triangle?

A 30-60-90 triangle is a special right triangle with some very special characteristics. If you have a 30-60-90 degree triangle, you can find a missing side length without using the Pythagorean theorem! Check out this tutorial to learn about 30-60-90 triangles!
How Do You Find the Area of a Triangle?

Finding the area of a triangle? Know the length of the base and the height? Then just take those values and plug them into the formula for the area of a triangle and solve! This tutorial shows you how.
What is the Formula for the Area of a Triangle?

Did you know that the formula for the area of a triangle can be found by using the formula for the area of a parallelogram? In this tutorial, you'll see how it's done! Take a look!