# Lessons - Geometry

**Angles**

**Angles**

Types of Angles

Classify Triangles by their Angles

Complementary Angles

Interior Angle - How to Find it with Regular Polygons

Exterior Angle - How to Find it with Regular Polygons

Parallel and Perpendicular Lines with a Transversal Line

Parallel and Perpendicular Lines with a Transversal Line - How to Find x to Solve for the Angle

Protractor - How to Measure an Angle

Supplementary Angles

Triangle - How to Find Missing Angle - Inside the Triangle

Triangle with Extended Angles - How to Find the Missing Angle - Inside and Outside the Triangle

**Coordinate Geometry and Graphs**

**Coordinate Geometry and Graphs**

Labeling Points in All Quadrants

Linear Equations - How to Graph a Linear Equation

Linear Equations with a Restricted Domain on Both Sides - How to Graph

Midpoint Formula - How to Use to It

Plotting Points in All Quadrants

Slope - How to Find Slope Using a Graph

Slope - How to Find Slope Using the Formula

Standard Equations - How to Graph a Standard Equation

**Circles**

**Circles**

Arc Length in Radians

Arcs of a Circle - Major Arc vs Minor Arc

Area of a Sector of a Circle - Degrees

Area of a Sector of a Circle - Radians

Convert Degrees to Radians

Convert Radians to Degrees

Standard Equation for a Circle Worksheet

Tangent?

What is a Circle? Video

**Circle Theorems**

**Circle Theorems**

Circle Theorem - Inscribed Angle in a Semi-Circle is 90Â° Worksheet

Circle Theorem - Inscribed Angle Theorem Worksheet

**Geometric Construction**

**Geometric Construction**

...

**Geometry Formulas**

**Geometry Formulas**

Distance Formula - How to Use to It

Midpoint Formula - How to Use to It

Rectangles - Perimeter Formula

**Geometric Transformations**

**Geometric Transformations**

Dilation Worksheet

**Polygons**

**Polygons**

**Area**

Rectangles Area - Count with Grids

Rectangles Area - Formula Method with Grids

Rectangles - Area Formula Method without Grids

Trapezoids - Area - Formula Method

**Perimeter**

Rectangles - Perimeter with Grids

Rectangles - Perimeter Formula Method

Rectangles - Perimeter Scaling Up

**Solid Geometry**

**Solid Geometry**

Surface Area of a Cylinder Worksheet

Volume of a Cylinder Worksheet

**Triangles**

**Triangles**

Classify Triangles by their Angles

Classify Triangles by their Sides

Law of Sines worksheet

Ambiguous Case - Law of Sines worksheet

Law of Cosines worksheet

Pythagorean Theorem - Why it Works worksheet

Pythagorean Theorem - Find the Missing Side

Pythagorean Theorem - Converse

Similar Triangles - What are they? worksheet

Similar Triangles - Find the Odd One Out

Triangle - How to Find Missing Angle - Inside the Triangle

Triangle with Extended Angles - How to Find the Missing Angle - Inside and Outside the Triangle