Question

find the area of a equilatrel triangle whose one side is 6 cm​

Answer 1

Answer:

area of anequilateral triangle is √3/4 side ^2 so,

√3/4 * 36 so the answer is 9√3

Answer 2

Answer:

$we \: know \: that, \\ all \: sides \: are \: equal \: in \: equilateral \: triangle. \\ given ,\\ 1st \: side \: of \: an \: equilateral \: triangle = 6cm$

$its \: 2nd \: side \: = 6cm ²\: \\ its \: 3rd \: side \: = 6cm² \\ s = \frac{6 + 6 + 6}{2} cm² \\ = \frac{18}{2} cm² \\ = 9cm² \\ area \: of \: the \: equilateral \: triangle \\ = \sqrt{9 (9 - 6)(9 - 6)(9 - 6) } cm² \\ = \sqrt{9 \times 3 \times 3 \times 3 \:} cm² \\ = \sqrt{3 \times 3 \times 3 \times 3 \times 3} cm²$

$= (3 \times 3 \sqrt{3})cm² \\ = 9 \sqrt{3} cm² \\ = (9 \times 1.732)cm² \\ = 15.588cm²$