No
yes
Yes
The last side length could be between 4 units and 10 units inclusive.
How about 3, 4 and 5 or 6, 8 and 10 in fact any of a Pythagorean triplets will are possible.
No, it is not.
No
No.
yes
Yes
True and it will be an equilateral triangle
Yes
true
That depends on what the side lengths are. Until the side lengths are known, the triangle can only be classified as a triangle.
true
If its a right angle triangle then its side lengths could be 3, 4 and 5
The last side length could be between 4 units and 10 units inclusive.