Question

Triangle J'K'L' shown on the grid below is a dilation of triangle JKL using the origin as the center of dilation:

Two triangles on a grid. First triangle has vertices J 2 and 4, K 3 and 2, L 4 and 3. Image triangle has vertices J prime 6 and

Which scale factor was used to create triangle J'K'L'? (1 point)

1 by 2
3
1 by 3
2

Answer 1

because the origin was used as the center of dilation, the scale factor can be found by dividing (any side length of J'K'L') by its corresponding side on JKL

for instance, you could divide J'K' / JK

can you try finding the lengths of J'K' and JK?

Answer 2

just want to elaborate: use the distance formula on J' and K' to find J'K' and again on J and K to find the length of JK