Yes, and it would have to be a right angled triangle as the sides are in ratio 3:4:5 6^2 + 8^2 = 36 + 64 = 100 = 10^2 . Good old Pythagoras!
Any number between 3 and 15
Yes and the given lengths would form an isosceles triangle.
No. Angles don't have anything called a side length. However, one can use trigonometry to compute the angles of a triangle based on the side lengths of the triangle (triangles do have side lengths).
Because all side lengths are different, it must be a scalene triangle.
The sum of the 2 shorter sides must be greater than the longest side to form a triangle
If its a right angle triangle then its side lengths could be 3, 4 and 5
Any number between 3 and 15
That number is called the "perimeter" of the triangle.
Yes and the given lengths would form an isosceles triangle.
That depends on what the side lengths are. Until the side lengths are known, the triangle can only be classified as a triangle.
The dimensions of the scalene triangle could be 7 by 5 by 3 inches
Yes
Yes.
The sides of a triangle are its lengths are cannot be negative. However, you could place a triangle on coordinate system and some points where the vertices are could be negative numbers.
No. Angles don't have anything called a side length. However, one can use trigonometry to compute the angles of a triangle based on the side lengths of the triangle (triangles do have side lengths).
An isoceles triangle! It has two lengths the same!
Because all side lengths are different, it must be a scalene triangle.