Answer:
ans: 80 °
Step-by-step explanation:
given two triangle are isosceles triangle so,
triangle having angle a;
a + 2d = 180
d = 54° ( since a= 72°)
d is vertically opposite to angle of triangle containing x,
similar reason for b ,
hence
x+ d + b = 180
x = 180 - 54 - 46
= 80°
