Question

(0,0) , (1,2) , (-1,2) what is area of a triangle
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Answer 1

Answer:

2 sq.units

Step-by-step explanation:

let these points are,,

A(0,0), B(1,2), C(-1,2)

so, as area of triangle,,

A = 1/2|x1(y2-y3)+x2(y3-y1)+x3(y1-y2)|

so, A = 1/2|(2-2)+1(2-0)+(-1)(0-2)|

= 1/2|0+2+2|

= 1/2×4

=> 2 sq.units