What Makes a Shape?
Watch to see how we group shapes by their sides and corners (vertices)!
Note: All Khan Academy content is available for free at www.khanacademy.org
Sides vs. Corners
A side is a straight line. A corner is where two lines meet.
Triangle
3 Sides
3 Corners
3 Sides
3 Corners
Square
4 Equal Sides
4 Corners
4 Equal Sides
4 Corners
Rectangle
4 Sides (2 long, 2 short)
4 Corners
4 Sides (2 long, 2 short)
4 Corners
Circle
0 Sides
0 Corners
0 Sides
0 Corners
How many sides?
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🏆 Shape Master!
You can identify 2D shapes like a pro! You know exactly what makes a triangle a triangle.