Question

Find the area of equilateral triangle whose perimeter is 180 cm ...
define in a easy way​

Answer 1

if you are not comfortable with the method I used then try making a perpendicular and then by using pythagoras theorm find the length of the perpendicular

after having the dimensions of both side and perpendicular use the area formula i.e., b×h/2

Answer 2

Area of equilateral triangle=root3a^2/4

Perimeter =3a

180=3a

a=60

Area={root3 x (60)^2}/4

=root3 x 3600/4

=root3 x 900

=900 root3

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