Question

One side of an equilateral triangle is 4cm. Find its area by Heron's Formula.

Answer 1

4√3 is the answer of t

Answer 2

Semi perimeter = (4 + 4 + 4)/2 = 6 cm


Area = $\sqrt{6(6 - 4)(6 - 4)(6 - 4)} \\ \\ =\ \textgreater \ \sqrt{6(2)(2)(2)} \\ \\ \\ =\ \textgreater \ \sqrt{3(2)(2)(2)(2)} \\ \\ =\ \textgreater \ 4 \sqrt{3} cm^2$