Question

Work out the angle of X

Answer 1

x = 99

Explanation:

Since x is on a straight line the adjacent angle and x must equal 180. We will call this adjacent angle B. The angle to the right of B also is on a straight line.

So,

180 - 123 = the inside angle Simplify

57

The addition of a triangles interior angles equals 180

180 = 42 + 57 + B Move variables to one side

180 - (42 + 57) = B Simplify

81 = B

Now we can solve for X

180 - 81 = x Simplify

99