To find the area of the shade area you:
1. Find the area of the rhomboid that has the next measurements:
Height h: 7cm
Base b: 10cm
Then you use the formula:
[tex]A_R=b\cdot h[/tex]
2. Find the area of the rectangle (not shaded) with the next measurements:
Height h:2cm
Base b:3cm
Then you use the formula:
[tex]A_r=b\cdot h[/tex]
3. You know that the area of the shaded region is the area of the rhomboid minus the area of the rectangle (not shaded):
[tex]A_S=A_R-A_r[/tex]
Then so, the area of the shaded region is 64cm^2
