Question

4Q) Find the area of an equilateral
triangle whose one side is 7 cm

Answer 1

Answer:

Area of equilateral Δ

$\frac{ \sqrt{3} a {}^{2} }{4} \\ \frac{ \sqrt{3 } \times 7 \times 7 }{4} \\ \frac{49 \times 1.73 }{4} \\ 21.19cm {}^{2}$