Question 1036986
Using heron's formulae find the area of equilateral triangle of side a units
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s = (a + a + a)/2 = 3a/2
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{{{Area = sqrt(s*(s-a)*(s-a)*(s-a))}}}
{{{Area = sqrt((3a/2)*(a/2)^3)}}}
{{{Area = sqrt(3a^4/16)}}}
{{{Area = a^2*sqrt(3)/4}}}