Question

If the area of an equilateral triangle is 81√3cmsqfind its height

Answer 1

Heya!!

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Since area of an equilateral triangle = √3/4 * side ^2

=) 81√3 cm^2 = √3/4 * side^2

=) 81*4 cm^2 = side^2

=) 324 cm^2 = side ^2

=) 18cm = x

Since height of an equilateral triangle = √3/2 * side

=) h = √3/2 * 18 cm

= 9√3 cm

Hope it helps uh :)

Answer 2

hii brainly user
in this picture u see the full solution with formula and concept
for calculation of height u can use the formula √3/2×side instead of Pythagoras theorem.
I hope U r easily understand.