Question

What is the value of x?

○15
○20
○60
○180

Answer 1

those lines mean the sides are congruent

since they are congruent, the angles opposite them are congruent

that means 3x=60

divide by 3 both sides

x=20

x=20 degrees

Answer 2

x = 20, 

i forgot how to explain it sorry

but i know it is 20 due to the fact that the 2 sides are congruent

hope this helps