A. Write the equations of the lines in slope-intercept form (y=mx+b). You
should have 2 equations written.
_____________________________
_____________________________

b. What is the solution to the Systems of Equations graphed at right?

c. How do you know your answer in part b is correct?

  C. Triangle BEC

Step-by-step explanation:

Point D is not part of triangle ABC, so the "pieces of a right triangle" similarity theorem cannot apply to any figure containing point D. Also, the middle letter of the triangle designator must be the vertex with the right angle.

Only one answer choice remains: Triangle BEC.