2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 sides are the same length.

The most common shapes with straight sides (squares and rectangles) are made with 90 degree angles. It is important to be able to construct 90 degree angles to make these figures accurately. To ...

That's probably when you learned about polygons -- and perhaps the last time you thought about those two-dimensional, multisided shapes with straight sides. Skip to content All Sections ...

2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 sides are the same length.