Equilateral triangle

Calculate the area of an equilateral triangle with a perimeter of 72 cm.

Final Answer:

S =  249.4153 cm2

Step-by-step explanation:

o=72 cm  o = 3a  a=o/3=72/3=24 cm  S = 2ah  h = 3/2 a  S=a2 43=242 43=144 3=249.4153 cm2

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