### Home > MC2 > Chapter 8 > Lesson 8.2.5 > Problem8-80

8-80.

Use the drawing below to answer the questions below. Assume the figure is drawn to scale.

1. Identify three types of triangles in the drawing.

The three triangles are highlighted:

Triangle $ABD$ has two sides of equal length.
Notice the size of the angles of the other two triangles.

Triangle $ABD$ is an isosceles triangle, triangle $ABC$ is acute, and triangle $BCD$ is obtuse.

2. What do you know about the angles labeled $x$ and $y$?

If two angles are supplementary, what is their sum?