Answer:
hope it helps
Step-by-step explanation:
1. area = 15*15 - 5*6 = 195
2. area = (8+16)*8 /2 - 5*3 = 96 - 15 = 81
3. area = 12*3 + 9 * (12 - 4 - 4) = 36 + 9*4 = 36+36 = 72
4. x = 6-3 = 3
y = 3- (-1) = 4
z = 7-3 = 4
area = 2*x*y/2 + y*z = 2*3*4/2 +4*4 = 12+16 = 28
