We are given the sides of the triangle ABC as 2, 6 and 11.
We see that the sum of the length of the sides with lengths 2 and 6, 2+ 6 = 8 is smaller than the length of the third side which is 11.
It is essential in a triangle for the sum of any two sides to be greater than the third side.
Therefore we cannot have a triangle with the sides 2, 6 and 11.
ABC cannot be a triangle.
the sum of two side of a triangle is always greater than the third side. this is one of the property of a triangle.
here the side are 2, 6 and 11
2+6 = 8< 11, so these cannot be a trianle.--[to be noted]
perimeter is the sum of the length of all the sides.
so the perimeter would be 2+6+11 = 19
So the are of the triangle would be
area of triangle = sqrt(s*(s-a)*(s-b)*(s-c))
This is known as heron's formula
s=semiperimeter = perimeter/2 :
a,band c are the sides of the triangle