Question

if the area of a equilateral triangle is 81root 3 cm square. find its perimeter​

Answer 1

Answer:

area=root 3/4a^2

81root 3=root 3 /4a^2

81=1/4a^2

a^2=1/81×4

a=1/18

Step-by-step explanation:

so side of a equilateral triangle is 1/18