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Find the area of a triangle with sides 13 cm, 14 cm and 15 cm (in $cm^{2}$ ).

Class 9Area of a Triangle by Heron's FormulaMensuration

A76
B84
C168
D92

Step-by-Step Solution

s = 21

. Area =

21 \cdot (21 - 13) \cdot (21 - 14) \cdot (21 - 15) = 21 \cdot 8 \cdot 7 \cdot 6 = 7056 = 84 cm^{2}

.

Answer: B) 84

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