Given that the length of one side of an isosceles triangle is equal to 5 and the length of the other side is equal to 11, find the perimeter of the isosceles triangle
When 5 is the bottom and the waist length is 11, the circumference of the isosceles triangle is 5 + 11 + 11 = 27; when 11 is the bottom, the waist length is 5, ∵ 5 + 5 < 11, ∵ 5, 5, 11 can not form a triangle