HELP PLEASEEE
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

Question

HELP PLEASEEE
  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

welshfella · Answer

HINT:  a scale factor is the ratio of the lengths of  corresponding sides of the triangles. - its one-dimensional .  The perimeter is also one-dimensional.

mathmale · Answer

Which perimeter would you suppose is the longer of the two?
Comparing the length of side PQ to that of side XY, how much longer is side XY?

anonymous · Answer

its either a or c

anonymous · Answer

. let me think

anonymous · Answer

it is A.

mathmale · Answer

Yes, each side of XYZ will be 3 times longer than the corresponding side of PQR.  This will increase the perimeter by factor of 3.