if the area of an eqiulateral triangle is 81√3cm sq find its perimetre
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Answered by
1
Given, Area = 81 root 3
root 3/4 a^2 = 81 root 3
1/4 a^2 = 81
a^2 = 324
a = 18
Perimeter = 3 * a
= 3 * 18
= 54cm.
Hope this helps!
root 3/4 a^2 = 81 root 3
1/4 a^2 = 81
a^2 = 324
a = 18
Perimeter = 3 * a
= 3 * 18
= 54cm.
Hope this helps!
Answered by
0
area of equilateral triangle =√3/4a^2
81√3=√3/4a^2
a^2=81√3*4/√3
a^2=324
a=18.cm
now perimeter of equilateral triangle =3a(sum of three side )
therefore perimeter =3*18=54cm.
if my answer is helpful for you then please mark as brain liest
81√3=√3/4a^2
a^2=81√3*4/√3
a^2=324
a=18.cm
now perimeter of equilateral triangle =3a(sum of three side )
therefore perimeter =3*18=54cm.
if my answer is helpful for you then please mark as brain liest
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