Question

An equilateral triangle has a perimeter of 18 units. How do you find the area?

Answer 1

Area `=9sqrt3=15.588 " "`square units

Explanation:

The formula for the area of an equilateral triangle is

Area `=sqrt3/4 s^2" " "` where `s=`side of the equilateral triangle

for an equilateral triangle, `s=("Perimeter")/3=18/3=6`

Solve the Area

Area `=sqrt3/4 s^2=sqrt3/4 (6)^2=9sqrt3=15.588`

God bless....I hope the explanation is useful.