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Perimeter of Irregular Figures

The perimeter...

Question

The perimeter of an equilateral triangle is 60cm. Then its side is ___ cm .

A

20

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B

60

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C

30

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D

40

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Solution

The correct option is A
20

Let the side of the equilateral triangle be ‘a’ cm.

$∴ a + a + a = 60 \Rightarrow 3 a = 60 c m$

$\Rightarrow a = 20 c m$

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