Question

Which of the following sets of numbers could not represent the three sides of a
triangle?

Answer 1

Explanation:

The length of the longest member must be less than the sum of the two shorter members.

Cannot be triangle

(8, 10, 19) because 19 ≥ 10 + 8

The other three could be triangles

If the longest equals the sum of the two shorter, then the three line segments all lie along the same line and no triangle exists.