Question

A dilation with a scale factor of 3 takes triangle PQR to triangle XYZ. What is the ratio of the perimeter of triangle PQR to the perimeter of triangle XYZ?

A) 1 : 3
B) 1 : 1
C) 3 : 1
D) 3 : 3

Answer 1

the dilation increases the length of each line of the trianggle by 3 (1:3)
So what do you think it will do to the perimeter.?

Note that the length of line and the perimeter are both one dimensional.