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1. Area of triangle from transformed vertices ●●○○○ 20 ptsThe triangle with vertices $\vec{A},$ $\vec{B},$ and $\vec{C}$ has area 12. Find the area of the triangle whose vertices are $-\vec{A} + \vec{B} + \vec{C},$ $\vec{A} - \vec{B} + \vec{C},$ and $\vec{A} + \vec{B} - \vec{C}.$