I am doing corrections and I have no idea how to do this problem.

A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the new triangle?

2 answers

the area increases by a factor of 3^2
consider that the area is 1/2 bh
If b and h both grow by a factor of three, the new area is
1/2 (3b)(3h) = 1/2 bh * 3^2
So, the new area is 9*13 m^2
Thank you @Steve!!