# Basic Geometry

### Example 1

Find the perimeter of a regular octagon with sides equal to 4 cm.

### Example 2

What is the perimeter of this figure?

### Example 3

The perimeter of an equilateral triangle is 30 cm. What is the length of each side?

### Example 4

Find the circumference of this circle.

### Example 5

A circular trampoline has a net surrounding it that is 25.12 ft long.

What is the diameter of the trampoline?