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Question

The figure shown above consists a of square BCDE and an equilateral triangle ΔABE. The length of ¯¯¯¯¯¯¯¯¯CD is 6 inches. Calculate the perimeter of ABCDE in inches.
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A
18
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B
24
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C
30
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D
42
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E
45
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Solution

The correct option is C 30
Consider BE as the base of the equilateral triangleABE.
Now, since EBCD is a square, BE=BC=CD=DE=6.
Thus BE=6
But, ABE is an equilateral triangle.
Hence AB=BE=AE=6.
Hence, the perimeter of the above figure is AB+BC+CD+DE+EA=5×6=30.

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