SOLUTION: Two circles have the same centre and their radii are 15cm and 17cm. A tangent to the inner circle at p cuts the outer circle at Q. Calculate PQ

Algebra ->  Circles -> SOLUTION: Two circles have the same centre and their radii are 15cm and 17cm. A tangent to the inner circle at p cuts the outer circle at Q. Calculate PQ      Log On


   

Question 1150792: Two circles have the same centre and their radii are 15cm and 17cm. A tangent to the inner circle at p cuts the outer circle at Q. Calculate PQ
Answer by ikleyn(52915) About Me  (Show Source):
You can put this solution on YOUR website!
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From right angled triangle OPQ (where the point O is the common center of concentric circles)


    | PQ | = sqrt%2817%5E2-15%5E2%29 = sqrt%28289-225%29 = sqrt%2864%29 = 8 centimeters.    ANSWER