Question

Find out the value of X.

Answer 1

first see its an isoceles triangle:
it means that ∠pqr  =  ∠prq

then ∠qpr = 80      --opposite angles of  2 intersecting lines
now

80 + pqr + qrp = 180

but those two are equal

80 + 2qrp = 180
2qrp = 100
qrp = 50

now x + qrp = 180    -linear pair
x+50 = 180
x = 130°

Answer 2

Answer is 130degree.
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