Answer:
267.3 in.
Step-by-step explanation:
Using the Sine Rule:
90 / sin 60 = BC/ sin 50
BC = 90 sin 50 / sin 60 = 79.6 in.
Angle C = 180 - 50 - 60 = 70 degrees.
90 / sin 60 = AB / sin 70
AB = 90 sin 70 / sin 60 = 97.7 in.
So the perimeter = 90+ 79.6 + 97.7
= 267.3 in.
