The diameter of a circle is 18 cm what is its area in terms of pi

Mathematics

1 answer:

NikAS [45]2 years ago

3 0

Answer:

A = 81π cm²

Step-by-step explanation:

The formula for area of a circle is A = πr², where r is the radius. The radius is half the diameter, so our radius for this problem is

18/2 = 9. So the area is..

A = π(9²) = π(81)

A = 81π cm²

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