2 Answers

Nelly · Answer 1 · 2018-10-30T22:14:25+0000

Answer: The diameter of circle is 7 inches and its approximate area is 38.5 square inches.

Explanation:

Given : The radius of a circle is 3.5 inches.

Diameter of circle is double the radius.

i.e. Diameter of circle will be 2(3.5)=7 inches.

We know that the area of a circle is given by :-

$\text{Area}=\pi r^2$ , where r is the radius of the circle.

Substitute r=3.5 in the formula, we get

$\text{Area}=(3.14159265359)* (3.5)^2=38.4845100065\approx38.5\text{ square inches}$

Hence, the diameter of circle is 7 inches and its approximate area is 38.5 square inches.

Matthew Madill · Answer 2 · 2018-11-04T03:58:57+0000

diameter is radius x 2

3.5 x 2 = 7 inches

Area = PI x r^2

using 3.14 for PI

area = 3.14 x 3.5^2 = 3.14 x 12.25 = 38.465 square inches round answer as needed

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