Chapter 10 - Geometry - 10.4 Area and Circumference - Exercise Set 10.4: 20

$39$ square feet.

Work Step by Step

The area of a rectangle can be calculated as: $T=a\times b$ The area of this figure can be calculated as: Area of the big rectangle (with sides of $2+5$ and $9+3$) minus the area of the small rectangle (with sides of 5 and 9): $T=(2+5)\times(9+3)-(5\times9)=7\times12-45=84-45=39$ square feet.

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