### Home > GC > Chapter 12 > Lesson 12.2.3 > Problem 12-76

12-76.

If and

*, find all possible coordinates of the vertex*

*.*

**Justify**your answer.

There are two possible locations for vertex .

Use the eTool below to visualize the problem.

Click the link at right for the full version of the eTool: *12-76 HW eTool*