Question

if the perimeter of an equilateral triangle is 90m then it area is​

Answer 1

Step-by-step explanation:

Find its area. =900×√34=225√3sq.cm.

Answer 2

Answer:

If P = 90m

So,side = 90/3 =30 m

So, length of each side is 30

S = ½(a+b+c)

Here S is ½(a+b+c) and a,b,c refers to three of the sides of the triangle.

S = ½(30+30+30) {a=b=c , because they are

sides of an equilateral trinagle}

S = ½ × 90 = 45

Area of triangle if S is given is :

√S(S-a)(S-b)(S-c)

S-a = 45-30=15

S-b = 45-30=15

S-c = 45-30 = 15

√45×15×15×15

√3×3×5×5×3×3×5×5×3

= 3×5×3×5×3

= 675 m²

Hope it helps you

have a nice day ahead