Question

(9) The perimeter of an equilateral triangle is 34.5 cm. Find length of the side.

Answer 1

Step-by-step explanation:

given,

Perimeter of a equilateral triangle = 34.5 cm

Since all sides are equal in an equilateral triangle,

Side = Perimeter / 3 = 34.5 / 3 = 11.5 cm

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Answer 2

Given :

• The perimeter of an equilateral triangle is 34.5 cm

To find :

• length of the side of equilateral triangle

Formula used :

• P = 3 a

where :-

• P = Perimeter of equilateral triangle

• a = length of each side of equilateral triangle

Solution :

Let each side of equilateral triangle be a

Perimeter of triangle = 34.5

Now according to the question :-

$\implies 34.5= 3a$

$\implies \dfrac{34.5}{3} = a$

$\implies \dfrac{345}{30} = a$

$\implies \dfrac{115}{10} = a$

$\implies {11.5}= a$

Answer :

Length of each side = 11.5 cm

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$\large\bf\blue{Additional-Information}$

Area of circle = πr²

Circumference of circle = 2πr

Area of square = (side)²

perimeter of square = 4× side

area of Rhombus = 1/2(diagonal 1)(diagonal 2)

Area of rectangle = length × breadth

Perimeter of rectangle = 2( length + breadth)

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