Question

What
UX
is the
value
ABC
of L
AX
+
B.

Answer 1

72°

Explanation:

Angle B is the same as angle C in this isosceles triangle. The sum of the angles is 180°, so you have ...

x + 2x +2x = 180°

x = 180°/5 = 36°

∠ABC = 2x = 2(36°) = 72°