A rectangle has 4 sides. It has two short sides and 2 ... Shape A, B and D all have 4 sides and 4 corner. Shape C is a triangle. It has 3 sides and 3 corners, so it is the odd one out.

Mathematicians’ Favorite Shapes Hold the Key to Big Mathematical Mysteries ...

The area of the rectangle is the length multiplied ... base is not necessarily horizontal or the lowest side of the shape. Image caption, For triangles that are not right-angled, the base is ...

Rectangles, arches, and triangles are the most common shapes used to build big structures. What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape.