Mathematics
diamondlaguerre
2016-09-24 12:44:06
A circle has a central angle measuring 7/10 radians that intersects an arc of length 33cm
ANSWERS
Ruby1208
2016-09-24 14:15:30

wheee the intercepted arc or whatnot is so a full circle is 2pi radians so radiansmeasure/2pi=arclengh/circumfernce c=2pir and radiansmeasureofarc=7pi/10 so (7pi/10)/2pi=33cm/(2pir) solve for r 7/20=33/2pir cm times both sides by r 7r/20=33/2pi times both sides by 20/7 r=660/14pi r=15.013648771610555050045495905369 round r=15 so about 15cm is the radius

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