9. Given A(2,1), B(6,3), C(8,1), D(4,2) and E(5,1), shown below prove that AABC-AADE. (4 points) D A- 2 LE 9) Hints: How can you prove triangles to be similar? Slope of DE = Slope of BC = What do these slopes tell you about the lines DE nad BC? Once you know this, what does this tell us about the angles in the triangles? **Look for a similar picture in the notes**