Question

Triangle DEF is a dilation of Triangle ABC with center (0, 0). What is the scale factor?

Answer 1

where is triangle DEF ?
is there a picture?

Answer 2

a scale factor is basically how much bigger is triangle DEF compared to triangle ABC

take a look at this link it might be very helpful to understanding how to answer your question http://www.icoachmath.com/math_dictionary/scale_factor.html

Answer 3

Now for your problem, as in the link, you could use a side of triangle ABC/a side of triangle DEF to get a scale factor or a ratio of how much bigger is the DEF triangle is compared to the ABC triangle

Answer 4

I am really sorry, I thought triangle DEF was bigger, sorry in all my above comments replace DEF with ABC so we need to find how much larger is ABC to DEF

Answer 5

here is how you could solve your question @arrodriquez