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OpenStudy (anonymous):
The radius of a circle measures twenty centimeters. What is the length of its diameter? 5 cm 10 cm 20 cm 40 cm
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OpenStudy (acxbox22):
radius=diameter/2 r=d/2 20=d/2 d=40cm
OpenStudy (anonymous):
ok. Thanks!
jimthompson5910 (jim_thompson5910):
I would write it as diameter = 2*(radius) d = 2*r d = 2*20 d = 40 but either way, you get the diameter to be 40 cm
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