Answer: 24 cm²
Explanation:
To find the area, first find the width of the rectangle.
Perimeter = (2 * Length) + (2 * Width)
20 = (2 * 6) + (2w)
20 = 12 + 2w
2w = 20 - 12
w = 8/2
w = 4 centimeters
Area = Length * Width
= 6 * 4
= 24 cm²
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