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How do you find the radius and diameter with the circumference

User Peztherez
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1 Answer

6 votes
ok

relation of diameter to radius
2 radius=1diameter
radius=1/2 diameter
2r=d
d/2=r


circumfernce=2pir
since 2r=d
circumference=2d

so
c=pid=2pir

so if ou have circunference and you want to find diameter and radius
c=pid
divde both sides by pi
c/pi=d

c=2pir
divide both sides by 2pi
c/(2pi)=r


so
r=c/(2pi)
d=c/pi
User Tensia
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