Question

What is the scale factor in the following dilation? The red triangle is the pre-image.
(I'll have image bellow in comments)

*3
*1/3
*2
*1/2

Answer 1

Take a guess, what do you think?

Answer 2

2?

Answer 3

Well, is the blue triangle bigger or smaller than the original (red) triangle? If it is bigger, then you automatically know that the answer will be a whole number, not a fraction. If it is smaller, then you know the dilation will be a fraction.

Answer 4

yea i know that so 2 right?

Answer 5

@MrNebula yes exactly! Just take one side length and figure out what number you have to multiply it by to get the new side length. You went from 3 to 6, so since 3*2=6, that's really all there is to it! =D

Answer 6

yes, good job!

Answer 7

YAY I DO KNOW STUFF

Answer 8

lol