The hexagon in the above diagram is regular. If has length 10, which of the following expressions is equal to the length of ?

A regular pentagon has been drawn on the side of a building by some mathematically minded graffiti artists. What is the length of a diagonal across it?

1. The length of a side is .

2. Each of the internal angles is degrees.

Calculate the diagonal of a rectangle.

Statement 1: The perimeter is 10.

Statement 2: The area is 4.