Will give brainest to the first correct !

27.89905693 units²

Step-by-step explanation:

First divide the shape into smaller pieces, then find the area of these pieces and then add them up to get the area of the whole shape.

Area of first triangle = 1/2×2×2 = 2

Area of second triangle = 1/2×2×5 = 5

Area of square = 2×2 = 4

Summing up the smaller sides of the shape, we obtain a larger triangle with sides 3.5 and a base of 9. Thus we find the longest/hypotenuse side by applying the Pythagoras Theorem

√((3.5)² + 9²) = √93.25

Area of large triangle = 1/2×3.5×√93.25 = 16.89905693

Add up the areas to find the area of the shape = 16.89905693+5+4+2 = 27.89905693

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.