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OpenStudy (anonymous):
Which expression can be used to find the area of a circle with a diameter of 40 cm? A. π · 20 B. π · 40 C. π · 202 D. π · 402
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OpenStudy (anonymous):
help me
OpenStudy (nurali):
area of a circle is π * r^2 The radius is half the diameter so the radius in this case is 20 cm. So r = 20 π * 20^2 = π · 402
OpenStudy (anonymous):
what is the ans
OpenStudy (nurali):
Last one.
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