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प्रश्न
Find the area of triangle FED
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उत्तर
Area of a triangle = `1/2` [(x1y2 + x2y3 + x3y1) – (x2y1 + x3y2 + x1y3)]
Area of ∆FED = `1/2[(-2 + 4.5 + 3) - (4.5 + 1 - 6)]`
= `1/2[5.5 - (- 0.5)]`
= `1/2[5.5 + 0.5]`
= `1/2 xx 6`
= 3 sq.units
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