Answer:
a) 36cm^2
b) 609m^2
c) 18cm^2
d) 30cm^2
i need someone else to check this because i mooted it on a break.
Explanation:
For a, we can solve for the larger rectangle and the smaller rectangle and subtract the smaller rectangle's area from the larger one. 12*5=60 and 3*8=24. 60-24=36.
For b, we can do the same thing, solving for the larger shape then the smaller. We can break up the shapes. We can split the larger shape into a rectangle measuring 17 by 36 and a rectangle measuring 14 by 11. This will give us a total area of 766. The smaller shape can be split into 7*7 and 6*18 with a total area of 157. The resulting number from the subtraction is 609.
for c, We can find the triangles. The picture shows that the 8cm side is broken in to parts of 4. the area of the larger is 24, and the smaller 6. the resulting number is 18.
for d, we can find the larger rectangle and the triangle. 12*4=48, and the triangle seems to be isoceles, so it's area is 18. The area of the shaded part is 30.