What is the are of an equilateral triangle of side 20 cm?  Answers:
A) 250√3
B) 150√3
C) 300√3
D) 200√3
E) 100√3
Area of an equilateral triangle = √3/4 S2   If S = 20, Area of triangle = √3/4 * 20 * 20   = 100√3 cm2;   Answer:100√3
<result>E</result>
What is the are of an equilateral triangle of side 20 cm?