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Answer
The required area = 12*[Area of the triangle - (Area of the sector - Area of the triangle)] = 12*(2*Area of the triangle - Area of the sector)
Angle of the sector = 30.
Area of the sector = 1/12 * $$\pi*7*7$$ = 49*$$\pi$$/12
Area of the triangle = 1/2*7*7*(sin 30) = 49/4
Required area = 12*(2*49/4 - 49*$$\pi$$/12)
