CD=9m, EC=15m, PQ=15m. What is the length of RP?

To find the length of RP, we need to use the fact that triangles CDE and PQE are similar.

In similar triangles, corresponding sides are proportional. We can set up the following ratio:

CD/EC = PQ/EQ

Substituting the given values, we get:

9m/15m = 15m/EQ

Cross-multiplying, we have:

9m * EQ = 15m * 15m

9m * EQ = 225m^2

Dividing both sides by 9m, we get:

EQ = 225m^2 / 9m

Simplifying, we have:

EQ = 25m

Since RP is equal to EC minus EQ, we can calculate its length:

RP = EC - EQ

RP = 15m - 25m

RP = -10m

Therefore, the length of RP is -10m.