Answer
L=72$\pi$$\approx$226.2 cm$^2$
Work Step by Step
r=.5l
r=6
h=r$\sqrt 3$
h=6$\sqrt 3$
L=.5lC
L=.5(12)(12$\pi$)
L=72$\pi$$\approx$226.2 cm$^2$
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