All triangles are unique compared to other polygons inasmuch that they have only 3 sides and no diagonals.
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If its an isosceles triangle it has 1 line of symmetry but if its an equilateral triangle it has 3 lines of symmetry
Every triangle is unique, so this question cannot have a serious answer.
Nothing. It is always possible to make a duplicate triangle.
Any triangle has three sides, whether it is a right triangle or not.
It is a rigid 2-dimensional shape.
if it has a right angle
Three non-collinear points do not determine a unique spherical triangle.
The interior angles of a triangle sum to 180 degrees. Whether it is a right triangle or not is totally irrelevant.
If any one of them is longer than or equal to the sum of the other two, they can't form a triangle. If the lengths of the line segments are a, b and c, they form a triangle iff:a + b > ca + c > bb + c > a
From the given dimensions no kind of triangle is possible.
432180. The legs are 441 and 1960.