Question

What is the answer to this???

Answer 1

18

Explanation:

First, we have to find out the scale factor of the triangles. So, we go from 20 to 30 by:

`20s=30\\s=3/2\\s=1.5`

1.5 is the scale factor. We're looking for x. We go from 12 to x by:

`12*1.5=x\\18=x`