Question

Determine the value of x in the triangle shown. answers : 180° 135° 90° 45°

Answer 1

x = 135°

Explanation:

The two angles form a 180° (straight) line. They are supplementary angles.

180° - 45° = 135°

Answer 2

x = 135

Explanation:

45 and x from a straight line so they sum to 180 degrees

45+x = 180

Subtract 45 from each side

45+x-45 = 180-45

x = 135