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 $180^\circ$.

   Hint (a):

   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 $180^\circ$.

   Hint (b):

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