Geometry

Question Analysis

The main focus is to find the circumference (perimeter of a circle) by determining the radius of the circle and then applying the appropriate formula.

Key Concept Explanation

The formula for the circumference of a circle is or , where is the radius and is the diameter. The radius is the distance from the center of the circle to any point on the circle, and the diameter is twice the radius.

Step - by - Step Solution

1. Determine the radius of the circle:

By observing the graph, the center of the circle is at . The circle intersects the - axis at and . The radius is the distance from the center to a point on the circle, say . Using the distance formula , with