A = /360 x r² If A= 15m² and = 90° . Find r Please help, I don't know how to work backwards The shape is a sector
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Originally Posted by wato A = /360 x r² If A= 15m² and = 90° . Find r Please help, I don't know how to work backwards They give you A and ... So plugging them into the equation, you have Now just solve the equation for r: Try to figure out the rest. I hope this helps! --Chris
Thanks man, that really helped er, one more question; if i were to have half a circle with the area being 15m² and i needed to find the radius. what would the equation be? A= r²/2 ?
Last edited by wato; Sep 4th 2008 at 05:12 PM.
Originally Posted by wato Thanks man, that really helped er, one more question; if i were to have half a circle with the area being 15m² and i needed to find the radius. what would the equation be? A= r²/2 ? --Chris
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