Sides and Corners
Counting a shape’s parts
Shapes have sides and corners. Counting them helps us name and sort shapes!
Triangle
3 sides
3 corners
Square
4 sides
4 corners
Circle
1 curved side
0 corners
A side is an edge; a corner is where two sides meet. A triangle has 3 sides and 3 corners; a square has 4 and 4; a circle has 1 curved side and no corners. Counting sides and corners helps you name any shape!