find the area of the triangle formed by the points. (i) (-1,6), (-3,-9), (1,-3) (ii) (0,0), (1,0), (0,1).
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i) 10.6*2.5*0.5= 13.25
ii)0.5*1*1= 0.5
ii)0.5*1*1= 0.5
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