Question

if the radius of a circle is 3.5 inches its diameter is ____ inches and its approximate area is____ square inches

Answer 1

The diameter is 7 inches and the area is 38.465. I got the answer by taking the area of a circle's formula which is

pi r ^2

Answer 2

Diameter = 7 inches

Area of circle is 38.46 inches²

Explanation:

Given :The radius of a circle is 3.5 inches.

We have to find its diameter and area.

Since diameter is twice of radius.

So radius = 3.5 inches

Diameter = 2× 3.5 inches = 7 inches

Area of circle =
`\pi r^2`

Substitute, r = 3.5

Area of circle =
`\pi (3.5)^2`

Simplify , we have,

Area of circle =
`\pi 12.25`

Using π = 3.14

We have,

Area of circle =
`38.465`

Thus, Area of circle is 38.46 inches²