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strojnjashka [21]
3 years ago
5

Find the circumference and the area of a circle with diameter 3cm

Mathematics
1 answer:
Margarita [4]3 years ago
7 0

Formula to find the area: A=πr^2

Formula to find circumference: C=2πr

Diameter is twice the length of the radius, so if you're given diameter of 3, the radius is half of that, which that would be 1.5.

<u>A=π(1.5)^2</u> A= 3.14x1.5^2 = <u>7.065</u>

Don't forget to round that and that becomes 7.07.

<u>C=2π(1.5)</u> C= 2x3.14x1.5 = <u>9.42</u>

That stays as it is.

Area= 7.065

Circumference= 9.42

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