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  • phi
You need to find the radius of the circle. Sketch the problem and draw in a radius make it perpendicular to one of the triangle's sides.
  • phi
|dw:1389710684921:dw|
  • phi
do you know about 30-60-90 triangles? and how to find the length of the short side (the radius "r")?

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Other answers:

3-60-90 yes. radius? just divide the diameter by 2 right?
  • phi
You don't know the diameter. See the picture posted up above. what is ½ of the triangle's side?
  • phi
sides are 28√3 long.
14√3
  • phi
|dw:1389711592719:dw|
use tan30= r/14√3?
  • phi
you could but 30-60-90 triangles are special. http://www.regentsprep.org/Regents/math/algtrig/ATT2/Ltri30.htm
  • phi
can you find "r" ?

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