Question

What is the value of X?
A. 50
B. 55
C. 160
D. 20

Answer 1

The answer is A 180-105=75
75+55=130
180-130=50
A

Answer 2

Option A. x = 50°

Explanation:

In the given triangle we will apply the condition that sum of all internal angles of a triangle is 180°

x + 55 + C = 180°--------(1)

Here angle C is the supplementary angle of 105°

Therefore C = 180 - 105 = 75°

Now we put the value of C in the equation 1

x + 55 + 75 = 180

x + 130 = 180

x = 180 - 130

x = 50°

Therefore option A. 50° is the correct option.