The perimeter of the given figure is 70 ft. Find the length of the side EF.

15 ft

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20 ft

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10 ft

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5 ft

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Solution

The correct option is C 10 ft
Perimeter = AB + BC + CD + DE + EF + FG + GA
70 ft = 10 ft + 5 ft + 5 ft + 5 ft + EF
+ 20 ft + 15 ft
70 ft - 60 ft = EF
10 ft = EF

Thus, the length of EF is 10 ft.

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