Answer:
105 psychology textbooks. 189 physics textbooks.
square has 4 equal sides
so A = 144 = 12^2
A = L x W
= W. W
= W^2
12^2 = W^2
so W = 12
answer: one side of the square = 12
4;3 might be the answer
angle KJG = angle FGJ (by alternateinteriorangle)
