Answer:
area = 72.25
Explanation:
9. Challenge
The T-shaped figure is 3 side-units wide, so the total perimeter is 10 side-units. That makes the length of a side-unit be ...
10 × (side-unit) = 42.5
side-unit = 42.5/10 = 4.25
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You will notice that the T-shape is composed of 4 squares, each with this side length. Then the area is ...
A = 4 × s² = 4 × 4.25² = 72.25