Answer:
Step-by-step explanation:
QA = QC = 5.9 ⇒ PA = 27.4 - 5.9 = 21.5
PB = PA = 21.5
CR = BR = 12.2
So, the perimeter:
P = 27.4 + 5.9 + 2×12.2 + 21.5 = 79.2