Question

Answer the next two questions based on the information given in this diagram.

18 in
1. What is the diameter of the circle above? |
2. What is the radius of the circle above?

Answer 1

Answer: 1: 18 inches. 2: 9 inches

Explanation:

The diameter of a circle is the distance of a line segment that has its endpoints on two of the edges, and passes through the center of the circle. One such line is shown in the diagram to be of 18 inches, so we know that the circle has a diameter of 18 in.

the second question asks for the radius, and this can be found by taking half of the diameter. by definition, the radius of a circle is the distance from an edge to the center.

Hope this helped! :)

Answer 2

diameter = 18 in

radius = 9 in

Explanation:

The diameter is the widest part of the circle.

From inspection of the diagram, the diameter is 18 in.

`\mathsf{radius=\frac12diameter}`

⇒ radius = 18 ÷ 2 = 9 in