Question

The semi-perimeter of an equilateral triangle whose side is 12cm is
options :

16cm
12cm
18cm​

Answer 1

Explanation:

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Answer 2

Semi perimeter = a + b + c / 2

where a , b , c are the sides of the traiangle,

Then, According to the question,

S = 12 + 12 + 12 / 2

S = 36 / 2

S = 18 cm