Question

If an image of a triangle is congruent to the pre-image, what is the scale factor of the dilation?

0.1
1/2
1
10​

Answer 1

C. 1

Explanation:

Answer 2

1

Explanation:

A dilation of .1 or 1/2 would decrease the size. Since the numbers are smaller than zero the triangles would no longer be congruent. A dilation of 10 would increase the size of the triangle, causing the triangles to no longer be congruent. A scale fact of one is equivalent to the same size because 1 does not increase or decrease the size.