Khan Academy categorizes shapes based on their angles and sides.
With a helpful chart, Math is Fun shows you all the different classifications of polygons.
In this series of short videos, Khan Academy shows you how to solve for area and perimeter.
Khan Academy shows you how to interpret angle measurements and draw your own 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.
Choose from a variety of geometry games here.