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An isosceles triangle has perimeter 36 cm and each of its equal sides is 13 cm.
Find the area of the triangle (in $cm^{2}$ ).

Class 9Area of a Triangle by Heron's FormulaMensuration

A66
B54
C120
D60

Step-by-Step Solution

Base = 36 - 13 - 13 = 10 cm.

s = 18

. Area =

18 \cdot (18 - 13) \cdot (18 - 13) \cdot (18 - 10) = 18 \cdot 5 \cdot 5 \cdot 8 = 3600 = 60 cm^{2}

.

Answer: D) 60

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