Question

Write the supplement of an angle of measure 2y°.

Answer 1

Let the required angle measures x°

It is given that two angles measuring x° and  2y°are supplementary. Therefore, their sum must be equal to 180°.

Or, we can say that:

x + 2y = 180

x = 180 - 2y

Hence, the required angle measures (180 - 2y)°.