Mathematics
dpula2
2015-11-03 18:18:12
find the area of a triangle if coordinates are (-2,-2), (-2,3), and (2,-1)
ANSWERS
vcurtis2015
2015-11-03 19:10:04

Hello, The formula to use, of the coordinates of the vertices of the triangle (x1, y1), (x2, y2), (x3, y3) A = x1y2 + x2y3 + x3y1 – x1y3 – x2y1 – x3y2. Then substituting the values, we have: A=(-2×3)+(-2×-1)+(2×-2)-(-2×-1)-(-2×-2)-(2×3)=-6+1-4-(2)-(4)-6= 6+1-4-2-4-6=-9 Bye :-)

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