GEOMETRY LESSONS

Alternate Exterior Angles

Alternate Interior Angles

Altitude of a Triangle

Area of a Circle

Area of a Rectangle

Area of a Sector of a Circle

Area of a Circle Practice Problems with Answers

Area of a Semicircle

Area of a Triangle

Area of Equilateral Triangle Formula

Circumference of a Circle

Classifying Triangles by Angles

Classifying Triangles by Sides

Complementary Angles

Corresponding Angles

Heron’s Formula

Perimeter of a Rectangle

Perimeter of a Square

Pythagorean Theorem

Pythagorean Theorem Practice Problems with Answers

Pythagorean Triples

Pythagorean Triples: How to Generate using a Formula

Pythagorean Triples: A List of Pythagorean Triples

Supplementary Angles

Vertical Angles