Geometry

Video Lesson: Classifying shapes by lines and angles

Khan Academy categorizes shapes based on their angles and sides. 

Video Lesson: 2D Shapes

With a helpful chart, Math is Fun shows you all the different classifications of polygons. 

Video Lessons:

In this series of short videos, Khan Academy shows you how to solve for area and perimeter. 

Angles

Video Lesson: Measuring Angles

Khan Academy shows you how to interpret angle measurements and draw your own angles. 

Estimating Angles:

Test your angle estimation skills in this game.

Compare Area & Perimeter

of 2 Figures: Can you tell the difference?

Guess the Shape:

Use the given clues to guess the correct 2D shape.

More Games:

Choose from a variety of geometry games here.