In triangle ABC AB is equal to 6 centimetre BC is equal to 7 cm and ac is equal to 5 cm find the area of a triangle ABC please give answer fast
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s = (6+7+5)/2
= 9cm
area(∆ABC) by heron's formula,
ar(∆) = √s(s-a)(s-b)(s-c)
= √9(9-6)(9-7)(9-5)
= √3×3×3×2×2×2
= 3×2×√3×2
= 6√6 = or 6×2.44 = 14.64cm²
= 9cm
area(∆ABC) by heron's formula,
ar(∆) = √s(s-a)(s-b)(s-c)
= √9(9-6)(9-7)(9-5)
= √3×3×3×2×2×2
= 3×2×√3×2
= 6√6 = or 6×2.44 = 14.64cm²
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