Question

What is the measurement of ∠2 and ∠11?

Answer 1

Answer:

180

Step-by-step explanation:

You measure the size of an angle with a protractor. Or could be shown by an arc on the figure to indicate which angles that are congruent. Two angles whose measures together are 180° are called supplementary e.g. two right angles are supplementary since 90° + 90° = 180°.