Supplementary of 123 degree is ______?

Supplementary of 123 degrees is 57o

Solutions

Two angles (90+90) are said to be supplementary if the sum of their measures is 180o.

The given angle is 123o

Let the measure of its supplementary be xo.

Then, = x + 123 = 180

= x = 180 – 123 = 57o

Hence, the supplementary of the given angle measures 57o.