The triangle inequality theory means that the two short sides of a triangle has to be greater when added up,than the longer side.
Ex) 2+2=4(for the two smaller sides)
The longer side being 2,so the other two sides are greater.Then can also it be a trinagle.
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Obtuse
Sure, that is exactly what the triangle inequality tells us!
It is not possible to have a triangle with sides of those lengths. The two shortest sides of a triangle must always add to more than the longest side. This is known as the triangle inequality.
Finding the sides of any triangle that is not a right angle triangle
the Pythagorean theory