SOLUTION: Find the area of a circle with a diameter of 21.

Question 636075: Find the area of a circle with a diameter of 21.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Divide the diameter by 2 to get the radius. Square the radius and multiply by

. Leave your answer in terms of

for an exact answer, or use a convenient approximation of

to calculate a numeric approximation of the desired area. If you do a numeric approximation, round your answer to the nearest whole square measurement unit. The results of calculations based on measurements must never be reported to a greater precision than the least precise given measurement. Your diameter is measured to the nearest whole unit, so you must report to the nearest whole square unit.

John

My calculator said it, I believe it, that settles it

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