The program should raise an error if the triangle cannot exist.

## Hint

The sum of the lengths of any two sides of a triangle always exceeds the
length of the third side, a principle known as the _triangle
inequality_.

The program should raise an error if the triangle cannot exist.

## Hint

The sum of the lengths of any two sides of a triangle always exceeds or 
is equal to the length of the third side, a principle known as the _triangle
inequality_.

Correct definition for the Triangle inequality
Correct definition for the Triangle inequality

"or equal to" was missing.

In mathematics, the triangle inequality states that for any triangle,
the sum of the lengths of any two sides must be greater than or equal to
the length of the remaining side.

Source: https://en.wikipedia.org/wiki/Triangle_inequality
