Base = Height, Let them be x.

Solve quadratic equation:
x=6, x=-2(rejected because base and height is positive)
6x6/2 =18
Answer: I think 70 percent
Step-by-step explanation:
P=(15x-2+4x+7)2=(19x+5)2=38x+10
i dont know, my personal thoughts is that I will not do it:)