In the figure, find x in terms of a, b and c.
A.
a + b + c
B.
180o - (a + b + c)
C.
a - b - c
D.
a + b
E.
a + c
Correct answer is A
180 - x + a + b + c
= 180(sum of interior angle in triangle)
a + b + c = x.