Question

find the area of an equilateral triangle have side 2a

Answer 1

all sides are equal in equilateral triangle

so,  s = 2a+2a+2a/2 == 6a / 3 ==> 2a

√3a× √3a-√2a× √3a-√2a ×√3a-√2a  

√3a ×√a × √a ×√a

==> a2 √3