Question

if area of an equilateral triangle is root 3 by 4 a square
a. 21
b. 1
c. 11
d. 12​

Answer 1

A= 6.93

Step-by-step explanations

Let ABC be an equilateral triangle with sides 'a'. Now, draw AD perpendicular to BC. Here, we have ΔABD = ΔADC. We will find area of ΔABD using pythagorean theorem, according to which, the square of hypotenuse is equal to the sum of the squares of the other two sides.