Question

An equilateral triangle has the perimeter of 36 dm. What is its area ?

Answer 1

Answer:

perimeter=3a

1dm=10cm therefore 36dm=360cm

a=120cm

area 3^-2/4)×a^2

underroot3×120×120/4=14400/4× root3

3600×root3 cm^2 is the correct answer.