Question

area of triangle formed with (-5,-1),(3,-5)and(5,2) is _______sq.unit????​

Answer 1

$Area of triangle=\frac{1}{2}(x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)\\ \\=\frac{1}{2}(-5(-5-2)+3(2-(-1))+5(-1-(-5)) \\\\=\frac{1}{2}((-5.-7)+(3.3)+(5.4))\\ \\=\frac{1}{2}(35+9+20)\\ \\=\frac{1}{2}(64)\\ \\=32sq.unit$

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Answer 2

area of triangle formed with 32sq.unit .