Answer:
Area A = 30cm^2
Area B = 84cm^2
Area C = 30cm^2
Total Area = 114
Explanation:
The length of Leg A is 5cm (12-7) and we can see that Shape A is a triangle. The formula to a triangle is Area = 1/2bh. 1/2(5*12) = 30.
Area of B is just a rectangle. Area = lw , so (7*12) = 84
And Area of C is exactly the same as Area of A because they are the same shapes with the same leg lengths.