In the figure, find x in terms of a, b and c.

A.
a + b + c 
B.
180^{o} – (a + b + c) 
C.
a – b – c 
D.
a + b 
E.
a + c
Correct Answer: Option A
Explanation
180 – x + a + b + c
= 180(sum of interior angle in triangle)
a + b + c = x.
In the figure, find x in terms of a, b and c.
180 – x + a + b + c
= 180(sum of interior angle in triangle)
a + b + c = x.