### Home > MC1 > Chapter 5 > Lesson 5.1.3 > Problem5-28

5-28.

Consider two angles that add together to measure $180^\circ$.

1. Draw a diagram of two angles that have the same measures (i.e., angles that are equal) and add together to measure $180^\circ$.

What number multiplied by $2$ is equal to $180$ degrees? That number is the measure of each of your angles.

2. Draw a diagram of two angles that do not have the same measure that add together to measure $180^\circ$.

Remember that a $180^\circ$ angle forms a straight line. You can use any two angles that make a straight line when put together.