Math, asked by Ehsanul885, 7 hours ago

If the area of an equilateral triangle is 81root 3 cm^2 , find its perimeter.

Answers

Answered by brainlyehsanul
104

Step-by-step explanation:

Given :

Area of an equilateral triangle is 81√3 cm².

Find :

The perimeter of an equilateral triangle.

Solution :

Area of an equilateral triangle = 813 cm²

 \frac{ \sqrt{3} }{4}  \times (side) ^{2}  = 81 \sqrt{3}

(side)  ^{2}  =  \frac{81 \sqrt{3 } \times 4 }{ \sqrt{3} }

(side)^{2}   =  81 \times 4

side =  \sqrt{81 \times 4}

side  =  9 \times 2

side = 18 \:  \: cm.

Perimeter of an equilateral triangle = 3 × side

= 3 × 18

= 54 cm.

Hence :

The perimeter of an equilateral triangle is 54 cm.

Answered by choose12
0

Step-by-step explanation:

Each of equal sides of an isosceles triangle is 2 cm greater than its height. If the base of the triangle is 12 cm, find the area of a triangle.

Please give correct answer.

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