Math, asked by sandeep7556, 1 year ago

if the area of an equilateral triangle id36
underoot 3cm sq find perimeter​

Answers

Answered by suzikohalwa
2

Answer:

Solution,

Here,

Length of equilateral triangle (a) = ?

Area of equilateral triangle = 36√3 cm²

or,  (√3 / 4 a²) = 36 √3

or,  4a² = 36

or, a² = 9

or, a = 3

So, perimeter of equilateral traingle is = 3a = 3×3 = 9

Step-by-step explanation:


sandeep7556: thx
Rupam94: or √3a²/4
sandeep7556: okk
Rupam94: welcome
Rupam94: may I know in which class do u read
suzikohalwa: I read in 10 class
suzikohalwa: And you?
suzikohalwa: Oh sorry to tell that I am wrong. Have you got any way to solve this problem?
Rupam94: m too in class 10
Rupam94: but the question is of class 9
Answered by Rupam94
0

Answer:

now area = 36√3

√3a²/4=36√3

a²/4=36

a/2=6

a=12 cm

perimeter = 3×12=36 cm

Step-by-step explanation:

ar(equilateral \: triangle)= \sqrt{3} {a}^{2}  \div 4

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