Geometry
Video Lesson: Classifying shapes by lines and angles
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.
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.