Question

The measure of an angle is 112.4°. What is the measure of its supplementary angle?

Answer 1

Answer: 67.6 degrees

Explanation:

because supplementary angles are 2 angles that would equal 180 if they are combined so 180-112.4 gives you 67.6

Answer 2

`\large\boxed{y=67.6^\circ}`

Explanation:

How to find the measure of a supplementary angle?

Recall that if we add two supplementary angles, the sum will ALWAYS be
`180^\circ`. From this information we can derive an equation, where
`y` is always the unknown angle, and the known angle is given by the value
`x`:

`y+x=180`

We know that
`x=112.4`;

`y+112.4=180`

→ Decrease both sides by
`112.4`.

`y=67.6^\circ`