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A, B, and C are points of tangency. CQ = 5, PQ = 10, and PR = 14. What is the perimeter

of the triangle PQR?

User Vsvydenko
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1 Answer

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*see attachment for diagram

Answer:

Perimeter = 38

Explanation:

Recall: when two tangents are drawn to meet at a point outside a circle, the segments of the two tangents are congruent.

Given,

CQ = 5

PQ = 10

PR = 14

Perimeter of ∆PQR = RC + CQ + QB + BP + PA + AR

CQ = QB = 5 (tangents drawn from an external point)

BP = PQ - QB

BP = 10 - 5 = 5

BP = PA = 5 (tangents drawn from an external point)

AR = PR - PA

AR = 14 - 5 = 9

AR = RC = 9 (tangents drawn from an external point)

✔️Perimeter of ∆PQR = RC + CQ + QB + BP + PA + AR

= 9 + 5 + 5 + 5 + 5 + 9

Perimeter = 38

A, B, and C are points of tangency. CQ = 5, PQ = 10, and PR = 14. What is the perimeter-example-1
User Myusuf
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5.3k points