Question

find the area of equilateral triangle whose perimeter is 45 CM​

Answer 1

Answer:

hey there,

Perimeter of equi∆= 3×side

hence,side=45/3=15cm

so,area=√3/4×side×side

=√3/4×15×15

= 225√3/4 cm^2

thanks❤

ans k liye follow zaroor krna❤

Answer 2

✬ Area = 97.43 cm² ✬

Step-by-step explanation:

Given:

• Perimeter of an equilateral triangle is 45 cm.

To Find:

• What is the area of equilateral triangle ?

Solution: Let the measure of each side of equilateral triangle be S cm. Therefore,

➱ Perimeter = 3S ( All sides are equal)

➱ 45 = 3S

➱ 45/3 = Side

➱ 15 cm = Side

Now, as we know that

★ Area of Equilateral ∆ = √3/4 $\times$ s² ★

$\implies{\rm }$ Area = √3/4 $\times$ 15²

$\implies{\rm }$ Area = √3/4 $\times$ 225

$\implies{\rm }$ Area = 1.732/4 $\times$ 225

$\implies{\rm }$ Area = 389.7/4

$\implies{\rm }$ Area = 97.425 cm²

Hence, the area of equilateral triangle is 97.425 or 97.43 cm². ( Approx )