Answer:
x = 126 , y = 54
Step-by-step explanation:
The Δ has 2 congruent (equal) sides, indicated by the single dash through them.
This means the Δ is isosceles with base angles congruent , both y
The sum of the 3 angles in the triangle = 180° , then
y + y + 72 = 180
2y + 72 = 180 ( subtract 72 from both sides )
2y = 108 ( divide both sides by 2 )
y = 54
54 and x are a linear pair ( at the top vertex of the triangle ) and sum to 180
54 + x = 180 ( subtract 54 from both sides )
x = 126
