KaelQ85003 KaelQ85003
  • 29-10-2022
  • Mathematics
contestada

The diameter of a circle is 18 kilometers. What is the area?Give the exact answer in simplest form.

Respuesta :

AelaD553073 AelaD553073
  • 29-10-2022

Take into account that the area of a circle is given by the following formula:

A = π r²

where r is the radius of the circle. Consider that r is one half the diameter of the circle, then, you have:

r = 18/2 km = 9 km

replace the previous value into the formula for the area:

A = π(9 km)²

A = 81 π km²

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