Answer:
∠x = 72°
Step-by-step explanation:
since two sides are equal, their opposite angles are equal.
Then the upper angle is also equal to 54°.
All triangle angles add up to 180°.
∠x = 180 - 54 - 54 = 72°
gratr
Answer:n
n
90°
as a straight line is 180°
and the angle 4 is 90 degrees it must mean that the other side is 90 degrees too
