Mensuration (Area of 2- dimensional geometry)

Triangle Perimeter of triangle : [latex]\frac{a+b+c}{2}[/latex]   Area of triangle = [latex]\sqrt{s\times(s-a)\times(s-b)\times(s-c)}[/latex] where s = [latex]\frac{a+b+c}{2}[/latex]   Area of triangle  = [latex]\frac{1}{2}\times base\times height[/latex] = [latex]\frac{1}{2}\times b\times h[/latex] Equilateral triangle    Area of equilateral triangle = [latex]\frac{\sqrt{3}}{4}\times a^{2}[/latex] Height of equilateral triangle = [latex]\frac{\sqrt{3}}{2}\times Read More …