Pentagon

Pentagon – a polygon with 5 sides

Pens (pentagon) are held by your five fingers (five sides).

Example 1

A famous Pentagon

The US Department of Defence team building is known as The Pentagon.

Example 2

Although made as a spider’s web, there are three pentagons in this shape.

Example 3

Regular pentagons have sides that are all the same length, irregular pentagons have two or more sides that are different lengths.

Example 4

These are all pentagons but only the purple one in the middle is a regular pentagon, the others are all irregular pentagons.

Example 5

Although this shape looks like a rectangle with a corner cut off, it is still a pentagon.

Example 6

Pentagons can be convex or concave.