The perimeter would be 26cm.
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If the shape measuring 8 centimeters by 5 centimeters is a rectangle, the perimeter of the rectangle is 25 centimeters (2w + 2l)
A regular pentagon has five sides of the same length. Therefore, the perimeter of the shape will be 8 x 5 = 40 centimetres.
The perimeter of that closed image would be 21 centimeters. Thank you and have a lovely day!
The answer is 28 cm.
Each side is 8cm so the perimeter is 4*8 = 32 cm