Question

If the area of an equilateral triangle is 21.2 sq. cm , find the length of its each side
Answer is 6.99cm approx

Answer 1

Hello!!!

Here's the Answer :

(Given)
Area = 21.2 sq. cm

=>Area of equilateral triangle

Let the length of each side be a cm.

=>$\frac {1.732}{4}$ × ${a}^{2}$ = 21.2

=> 1.732 × ${a}^{2}$ = 21.2 × 4

=> 1.732 × ${a}^{2}$ = 84.8

=> ${a}^{2}$ = $\frac {84.8}{1.732}$

=> ${a}^{2}$ = 48.96

=> a = under root 48.96

=> a = 6.997

Answer 2

Answer:

formula...

Step-by-step explanation:

√3/4a²....√3=1.732