# OUR Math 8.1.9.4 Cool-down: Finding Missing Measurements

- Author:
- Jill Ambrose

## Points A', B', and C' are the images of 180-degree rotations of A, B, and C, respectively, around point O.

## 1.

Answer each question and explain your reasoning without measuring segments or angles.
Name a segment whose length is the same as segment *AO*.

## 2.

Answer each question and explain your reasoning without measuring segments or angles.
What is the measure of angle *A'OB'*?