SAT Triangles-Perimeter

Geometry Level 1

In the figure above, ABCDEFGABCDEFG is a regular heptagon. To each of its sides is attached an equilateral triangle. If the perimeter of ABCDEFGABCDEFG is 84, what is the perimeter of the star-shaped figure?

(A)   84\ \ 84
(B)   96\ \ 96
(C)   144\ \ 144
(D)   168\ \ 168
(E)   216\ \ 216

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