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natulia [17]
3 years ago
15

A circle has a circumference of 22 cm. What is the diameter, area, and radius. Round to the nearest tenth.

Mathematics
1 answer:
mars1129 [50]3 years ago
5 0
The circumference is 22
Circumference = 2πr 
22 = 2πr
It's the same thing as π*diameter
22 = <span>πd
divide both sides by </span><span>π to isolate d
d, or the diameter, equals 7.0028175 cm, or approx. 7 cm
the radius is half of the diameter so it is </span><span>3.50140875, or approx. 3.5 cm
the area of the circle is 
</span><span>A = π r²
A = </span>π (3.5)<span>²
A = </span><span>π (12.25)
A = 38.4845
The area equals approximately 38.5 cm^2.

Hope this helps!</span>

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