Question

Can the sides of a triangle have lengths 9, 11, and 20?

Answer 1

Answer:

The sum of the two smaller sides is supposed to be greater than the third side.  According to online, "as long as the sum of any two of those measurements is greater than the third measurement, the three 'sides' will fit together to make a triangle."

Since the smaller sides only add up to the third length this wouldn't be enough to create a triangle.  Therefore the final answer is no.