Question

The dashed triangle is a dilation image of the solid triangle with the center at the origin. Is the dilation an enlargement or a reduction? Find the scale factor of the dilation.

http://i42.tinypic.com/11rvsk4.png

Answer 1

I know that this is a reduction with a scale of 1/3 compared to the big triangle, but how do I show my work to prove that?

Answer 2

the image is the "after" picture so the "before" picture (called the preimage) is the bigger one. so this is a reduction....
just 1/3 to each of the lengths of the sides of the before picture and see if it will give you length of the sides of the "after" picture.

Answer 3

What should I write as my answer ???