Question

If the perimeter of an equilateral triangle is 120 cm. What its side?​

Answer 1

Answer:

40 cm

Step-by-step explanation:

perimeter - 120 cm = 3a

       ⇒ 120 = 3a

       ⇒ $\frac{120}{3}$ = a

       ⇒ 40 = a

∴sides of equilateral triangle = 40 cm

Answer 2

Step-by-step explanation:

Question:-

The perimeter of an equilateral triangle is 120cm

Find each side of the triangle.

Answer:-

Given :-

• Perimeter of the triangle = 120 cm

• The triangle is an equilateral triangle.

To find :-

Each side of the triangle

Process :-

As we all know that, all the sides of an equilateral triangle are equal. So,if we find only one side of the triangle,then it will all be equal to all sides.

$Perimeter \: of \: an \: equilateral \: triangle \\ \: = 3× a \: [ Where \: a \: is \: the \: side \: of \: triangle] \\ \\ ⇒Perimeter = 3×a \\ \\ ⇒120= 3×a \\ \\ ⇒3×a = 120 \\ \\ ⇒a = \frac{120}{3} = 40cm (Ans)$

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Hope it helps you...

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