Using dilations to make similar figures
given aabc, use a dilation with the center at the origin
to make a similar triangle with side lengths three times
as large. what are the coordinates of c' of the image?
(-6,3)
(-3,6)
(3,-6)
(6,-3)

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

236 cm 16 time 12 = 192

6 times 7 = 42

192+42