SOLUTION: The dashed triangle is the image of the solid triangle for a dilation with center at the origin. What is the scale factor? http://prntscr.com/r7incc a. 2/3 b. 3 c. 3/2 d.

Question 1152983: The dashed triangle is the image of the solid triangle for a dilation with center at the origin. What is the scale factor?
http://prntscr.com/r7incc
a. 2/3
b. 3
c. 3/2
d. 1/3
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

two triangles are similar, so corresponding sides are proportional
take a look at bases:
the length of the base of greater triangle is the distance from to => the length is
the length of the base of smaller image is the distance from to => the length is
so, the base of greater triangle to the base of smaller image is
The scale factor is
answer: b.

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