5 times 8.4= 42 inches
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A pentagon is a 5-sided figure, and the perimeter is the sum of the lengths of all the sides. A pentagon with 15-inch sides, will have 5 x 15 inches = 75 inches as its perimeter.
The perimeter of any pentagon is the sum of its 5 sides. So if a regular pentagon has sides that are 4 long, its perimeter is 20.
A pentagon has 5 sides A regular pentagon has all sides equal → perimeter of regular pentagon with side 17 cm = 5 × 17 cm = 85 cm
A pentagon has 5 sides. In a regular pentagon, all 5 sides are equal length, so the perimeter = 5 x 8 cm = 40 cm
Perimeter = 5*5 = 25 cm