Vertex points

Given the following points of a triangle: P(-12,6), Q(4,0), R(-8,-6). Graph the triangle. Find the triangle area.

Correct answer:

S =  84

Step-by-step explanation:

Px=12;Py=6 Qx=4;Qy=0 Rx=8;Ry=6  r=(PxQx)2+(PyQy)2=((12)4)2+(60)2=2 7317.088 p=(RxQx)2+(RyQy)2=((8)4)2+((6)0)2=6 513.4164 q=(RxPx)2+(RyPy)2=((8)(12))2+((6)6)2=4 1012.6491  s=r+p+q2=17.088+13.4164+12.6491221.5768  S=s (sr) (sp) (sq)=21.5768 (21.576817.088) (21.576813.4164) (21.576812.6491)=84

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