Perimeter of an equilateral triangle is...
Here $a$ , $b$ and $c$ are the length of the three sides of the equilateral triangle.

2 a + b

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3 a

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a + b + c

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a + 2 b

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Solution

The correct option is D $3 a$
Perimeter of an equilateral triangle = $3 a u n i t s$ .

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