This is a list of all Virtual Nerd tutorials in Geometry, organized by topic.

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### Fundamentals of Geometry

#### Points, Lines, and Planes

#### Measuring Segments

#### Measuring Angles

#### Angle Pair Relationships

#### Distance and Midpoints

- What Is the Distance Formula?
- What's the Midpoint Formula?
- What's the Midpoint of Two Points on a Number Line?
- How Do You Bisect a Segment by Constructing?
- How Was the Distance Formula Derived?
- How Do You Find the Midpoint Between Two Coordinates?
- How Do You Find the Midpoint of Two Points on a Map If You Have the Coordinates?
- How Do You Find the Distance Between Two Points?

#### Perimeter, Circumference, and Area

- How Do You Find the Perimeter of a Rectangle?
- What is the Formula for the Area of a Triangle?
- How Do You Find the Area of a Circle if You Know the Radius?
- How Do You Find the Perimeter of a Shape?
- How Do You Find the Circumference of a Circle if You Know the Radius?
- How Do You Find the Circumference of a Circle if You Know the Diameter?
- What's the Formula for the Perimeter of a Rectangle?
- What is the Formula for the Area of a Circle?
- What is Circumference?
- How Do You Find the Area of a Rectangle?
- What is the Formula for the Area of a Rectangle?
- How Do You Find the Area of a Triangle?
- How Do You Find the Area of a Circle if You Know the Diameter?
- What is Area?

### Reasoning and Proof

### Parallel and Perpendicular Lines

#### Parallel Lines and Transversals

#### Slopes of Lines

- What Does Undefined Slope Mean?
- What Does the Slope of a Line Mean?
- What Does 0 Slope Mean?
- How Do You Know if Two Lines are Perpendicular?
- What Does Positive Slope Mean?
- What is Rate of Change?
- What's the Formula for Slope?
- How Do You Find the Slope of a Line from Two Points?
- How Do You Know if Two Lines are Parallel?
- What Does Negative Slope Mean?
- How Do You Find the Slope of a Line from a Graph?

#### Lines In the Coordinate Plane

- How Do You Graph a Vertical Line?
- How Do You Write an Equation of a Line in Point-Slope Form If You Have the Slope and One Point?
- How Do You Write the Equation of a Line in Slope-Intercept Form If You Have the Slope and the Y-Intercept?
- How Do You Graph a Horizontal Line?
- What's Point-Slope Form of a Linear Equation?
- How Do You Put an Equation in Point-Slope Form Into Standard or Slope-Intercept Form?
- How Do You Put an Equation in Standard Form Into Slope-Intercept or Point-Slope Form?
- How Do You Write an Equation of a Line in Point-Slope Form If You Have Two Points?
- How Do You Write an Equation for a Vertical Line?
- How Do You Write the Equation of a Line in Slope-Intercept Form If You Have Two Points?
- How Do You Write an Equation of a Line in Slope-Intercept Form If You Have One Point and a Perpendicular Line?
- What's Slope-Intercept Form of a Linear Equation?
- How Do You Write an Equation for a Horizontal Line?
- How Do You Write an Equation of a Line in Slope-Intercept Form If You Have One Point and a Parallel Line?
- How Do You Graph a Line If You're Given the Slope and the Intercept?

#### Proving Lines Parallel

#### Parallel and Perpendicular Lines

### Congruent Triangles

### Relationships Within Triangles

### Quadrilaterals

### Similarity

#### Ratios and Proportions

- How Do You Solve a Proportion Using Cross Products?
- What's a Proportion?
- How Do You Find the Scale of a Model?
- How Do You Write a Ratio From a Word Problem?
- How Do You Use the Scale on a Map to Find an Actual Distance?
- What is a Scale?
- What's the Means-Extremes Property of Proportions?
- How Do You Find the Angles in a Triangle if You Have a Ratio of Their Measures?
- How Do You Solve a Scale Model Problem Using a Proportion?
- What's a Ratio?
- What are the Means and Extremes of Proportions?
- How Do You Solve a Scale Model Problem Using a Scale Factor?
- What is a Scale Drawing?

#### Similar Polygons

#### Similar Triangles

#### Parallel Lines and Proportional Parts

#### Dilations and Similarity Transformations

### Right Triangles and Trigonometry

#### The Pythagorean Theorem and its Converse

#### Similarity in Right Triangles

#### Special Right Triangles

#### Trigonometric Ratios

- How Do You Find a Missing Side of a Right Triangle Using Sine?
- What is the Tangent Ratio?
- How Do You Find the Cosine of an Angle in a Right Triangle?
- How Do You Find the Sine of an Angle in a Right Triangle?
- How Do You Find a Missing Side of a Right Triangle Using Cosine?
- What is the Sine Ratio?
- How Do You Find the Tangent of an Angle in a Right Triangle?
- How Do You Find a Missing Side of a Right Triangle Using Tangent?

#### Angles of Elevation and Depression

#### Vectors

#### Solving Right Triangles

### Transformations

### Circles

### Length and Area

#### Areas of Parallelograms and Triangles

- How Do You Find the Area of a Triangle?
- What is the Formula for the Area of a Triangle Using Sines?
- What is the Formula for the Area of a Parallelogram?
- How Do You Find the Height of a Triangle if You Know the Area and Base?
- What is the Formula for the Area of a Triangle?
- How Do You Find the Area of a Parallelogram?

#### Areas of Trapezoids, Rhombuses, and Kites

#### Circumference and Arc Length

#### Areas of Circles and Sectors

- How Do You Find the Area of a Circle if You Know the Radius?
- What is the Formula for the Area of a Circle?
- How Do You Find the Area of a Sector of a Circle?
- How Do You Find the Area of a Circle if You Know the Diameter?
- How Do You Find the Radius of a Circle if You Know the Area?
- What is the Formula for the Area of a Sector of a Circle?

#### Areas of Regular Polygons and Composite Figures

#### Perimeter and Area of Similar Figures

#### Geometric Probability and Simulations

### Surface Area and Volume of Solids

#### Introduction to Solid Geometry

#### Surface Area of Prisms and Cylinders

- How Do You Find the Lateral and Surface Areas of a Triangular Prism?
- How Do You Find the Surface Area of a Rectangular Prism Using a Net?
- What is the Formula for the Surface Area of a Cylinder?
- What is the Formula for the Surface Area of a Prism?
- How Do You Find the Surface Area of a Cylinder Using a Net?
- How Do You Find the Lateral and Surface Areas of a Cylinder?
- How Do You Find the Lateral and Surface Areas of a Rectangular Prism?

#### Surface Area of Pyramids and Cones

#### Volume of Prisms and Cylinders

#### Volume of Pyramids and Cones

#### Spheres

#### Congruent and Similar Solids