3 years ago

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.

A=π(1.5)^2 A= 3.14x1.5^2 = 7.065

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

C=2π(1.5) C= 2x3.14x1.5 = 9.42

That stays as it is.

Area= 7.065

Circumference= 9.42

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