QR is parallel to ST and PQ:QR = 2:1. Given the area of triangle PST is 18cm2, the area of triangle PQR in sq cm is?

Answer 1

Is ST a line in the interior of PQR?

If so, I must be missing something. Just knowing the ratio of two sides of PQR tells me nothing about the areas of either triangle.

Better explain the overall figure, not just a couple of lines.

Answer 2

PQR is an interior triangle within triangle PST. QR runs parallel to ST.