Find the perimeter of the pentagon ABCDE with sides AB = 7cm BC = 11cm CD = 13cm DE = 5cm EA = 9cm.

The perimeter is the sum of the lengths of all sides.
Since AB = 7 cm, BC = 11 cm, CD = 13 cm, DE = 5 cm, EA = 9 cm (by condition), then to find the perimeter you need to add all these sides:
AB + BC + CD + DE + EA = 7 + 11 + 13 + 5 + 9 = 45 (see)
Answer: the perimeter of the pentagon ABCDE = 45 cm.



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