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NISA [10]
4 years ago
14

I don't know it I need help

Mathematics
2 answers:
ira [324]4 years ago
7 0
If C=2pi times r, then r=C divided by 2pi, just use your calculator, punch in 53.4 ÷ 2 ÷3.14, the answer should be 8.5
Setler [38]4 years ago
6 0
Given:  The circumference of a circle is 53.4.
The formula for circumference is C = pi*d (and we are told to use 3.14 for pi).

Thus, the diameter (unknown) is c = C/pi = 53.4 / 3.14 = 17.0.

The radius is half that:  8.5.
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