Question

22.

Find the area of the triangle ABC whose vertices A (-5, -1); B (3, -5) and C (5,2)​

Answer 1

Step-by-step explanation:

ar of ∆= 1/2 [X1(y2-y3)+X2(y1-y3)+X3(y2-y1)

1/2[-5(-5-2)+3(-1-2)+5(-5+1)]

1/2[-5(-7)+3(-3)+5(-4)]

1/2[35-9-20]

1/2 [35-29]

1/2[6]

=3 units

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