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If the perimeter of an equilateral triangle is 18centimeters
each side is 6 centimeters long
and the semi-perimeter, s, is 9 centimeters long.
Using Heron's formula With sides a=b=c=6 and s=9
Area△=√s(s−a)(s−b)(s−c)
=√9×3×3×3
=9√3
each side is 6 centimeters long
and the semi-perimeter, s, is 9 centimeters long.
Using Heron's formula With sides a=b=c=6 and s=9
Area△=√s(s−a)(s−b)(s−c)
=√9×3×3×3
=9√3
adiazmina5a:
How is it possible
Solving for semiperimeter:
the formula is 3×side/2
the formula is 3×side/2
sry formula for semi-perimeter of equilateral triangle is 3×side/2
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Answer:
Step-by-step explanation:
A=B=C= 18 cm
So S = (A+B+C)/2
S = (18+18+18)/2
S = 54/2
S = 27
Herons formula
A = √S(S - A)(S- B)(S - C)
A = √27(27 - 18)(27 - 18)(27 - 18)
A = √27*9*9*9
A = √3*3*3*3*3*3*3*3*3
A = 81√3
A = 81*1.732
A = 140.292 cm^2
Sorry I gave u the wrong answer
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