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

Competition practiceAreas & Volumes

A76
B84
C168
D92

Step-by-Step Solution

s = (13 + 14 + 15) /2 = 21

. By Heron'

s

formula, area = √(21·8·7·6) = √

7056 = 84 cm^{2}

.

Answer: B) 84

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