In a triangle ABC, AB = 15 cm, BC = 13 cm and AC = 14 cm. Find area of triangle ABC and hence its altitude on AC.
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semi perimeter = 15+13+14/2
=42/2
=21
so by herons formula = whole under root 21(21-15)(21-14)(21-13)
=whole under root 21(6)(7)(8)
whole under root 7056
=84m^2
=42/2
=21
so by herons formula = whole under root 21(21-15)(21-14)(21-13)
=whole under root 21(6)(7)(8)
whole under root 7056
=84m^2
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