Question

find the area of an equilateral triangle of side 20cm​

Answer 1

the area of an equilateral triangle is

• $\frac{ \sqrt{3} }{4} \times {a}^{2}$
• $\frac{ \sqrt{3} }{4} \times {20}^{2}$
• $\frac{ \sqrt{3} }{4} \times 400$
• $\sqrt{3} \times 100$
• $100 \sqrt{3}cm^2$