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OpenStudy (anonymous):
Help please to make sure I am correct :) A circle that originally had a circumference of 31.4 cm, now has a circumference of 15.7 cm. What happened to the radius?
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OpenStudy (anonymous):
Is the radius halved?
OpenStudy (anonymous):
Yep your corect! ;) Nice job~
OpenStudy (cwrw238):
the relation between the circumference and the radius is C = 2 * pi * r where pi is a constant
OpenStudy (anonymous):
Yea, thank u! :)
OpenStudy (anonymous):
makes sense some how lol
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OpenStudy (cwrw238):
31.4 = 2pi r making r = 31.4 / 2 pi 15.7 = 2 pi r making r = 15.7 / 2 pi which is a half of 31.4 / 2 pi
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