7. In the following diagram, D and E lie on sides AB and AC such that DE || BC as marked. It is known that AD = 18 and DB = 12.
Men
prein. se
(a) Give a dilation that would map BC onto DE. State both the center of the
dilation and the scaling factor. Y=
cerer
74
2
20
B
(b) If BC = 15 and AC = 20, then find the perimeter of AADE. Show how you arrived at your answer.