Answer:
160mm²
Step-by-step explanation:
Finding the length/height:
Perimeter = 2(l+b)
2(l+40) = 88
2l + 80 = 88
2l = 8
l = 8/2 = 4
Hence, the length/height is 4 mm
Finding the area:
Area = l * b
= 4 * 40
= 160mm²
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