airasahir airasahir
  • 05-10-2019
  • Mathematics
contestada

find the area of equilateral triangle whose side 9 cm using heron's formula

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amalpowsina
amalpowsina amalpowsina
  • 05-10-2019

Answe[tex]\sqrt{3[/tex]81/4

Step-by-step explanation:

s= 9+9+9/2 = 27/2

s-a= 27/2 - 9/1 = 9/2

s-b= 27/2-9/1=9/2

s-c = 27/2-9/1= 9/2

area=[tex]\sqrt{27/2*9/2*9/2*9/2} \\\ =sqrt{(3*9)/2 * 9/2 * 9/2 *9/2}[/tex]

= [tex]\sqrt{3} *81/4\\[/tex]

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