Question

find the perimeter of the following
1 rectangle
2 Square
3 Equilateral traingle
​

Answer 1

Rectangle = 2(Length + Breadth)

Square = 4 * one side of square

Equilateral triangle = 3 * one side of triangle

Answer 2

Answer:

To Find:-

Perimeter of the given figures, i.e.,

• Rectangle
• Square
• Equilateral Triangle

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WHAT IS THE MEANING OF PERIMETER??

As we know, Perimeter means boundary of an object... For Example, the perimeter of the field is 500 m. Means, the boundary of the field is 500 m.

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• RECTANGLE:-

As we know, Rectangle is a closed figure in which, the opposite sides are parallel and one side is longer than the another one is known as a rectangle.

Let the length (big side) be = l

Let the breadth (small side) be = b

Hence, as we have to find the perimeter, we, at first write a suitable equation.

**It has 2 longer sides (length)

**Also 2 shorter sides (breadth)

Hence, Perimeter will be = 2l + 2b

Taking common = 2(l+b)

Therefore, Perimeter of Rectangle formula = 2(l+b)

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• SQUARE:-

We also know that a square is a closed figure having all sides same and making an angle of 90°.

Hence, let the side of the square be = s

Hence, as we have to find the perimeter, the perimeter will be:-

**It has 4 sides which are same.

= 4×side

As there are 4 sides.

Therefore, Perimeter of a square formula = 4(s) or simply 4×s.

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• EQUAILATERAL TRIANGLE:-

We also know that an equilateral triangle is a triangle having three sides same and measuring 60° per angle.

Hence, let the side be = x

Hence, the perimeter will be:-

**It has 3 same sides

= 3x

Therefore, perimeter of an equilateral triangle = 3x

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REQUIRED ANSWER:-

1. Perimeter of Rectangle = 2(l+b) {where 'l' is the length and 'b' is the breadth}
2. Perimeter of Square = 4s {Where 's' is the side of the square}
3. Perimeter of an equilateral triangle = 3x {Where 'x' is the side of the triangle}