Question

One angle in a linear pair is 70 degrees. What is the second angle.?

Answer 1

`110˚`

Explanation:

This is a pair of linear angles. Linear angles always form a line—that is, they form `180˚`, or a straight angle.

Therefore, the angle in the linear pair with the `70˚` angle must have a combined sum with the `70˚` angle of `180˚`.

We can write this as `70˚+x˚=180˚`, where `x˚` is the measurement of the other angle in the linear pair.

If we take the equation and subtract `70˚` from both sides, we see that `x˚=110˚`, which is the measure of the second angle.