Answer:
79.2 units
Step-by-step explanation:
Tangents to a circle from an external point are congruent , then
PQ = 27.4
QR = 5.9 + 12.2 = 18.1
PR = 12.2 + (27.4 - 5.9 ) = 12.2 + 21.5 = 33.7
Then
perimeter = PQ + QR + PR = 27.4 + 18.1 + 33.7 = 79.2
