Question

In the figure, if the measure of 21 = 112°, what's the measure of 212?

Answer 1

For this question, we can assume that the lines are parallel.

Explanation:

This means that angle 1 is congruent to angle 11.

Afterwards, we know that angle 11 + angle 12 equal a straight line, or 180º.

If angle 11 is congruent to angle 1, that means measure angle 11 = 112º.

Then, we subtract 112 from 180 which would give us 68.

Therefore, the answer is 68º.