What is the length will mark brainlst and 20 etra points just give me the answer plz dont tell me how to do it and not the answer just answer

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

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