Question

Which set of numbers CANNOT represent the lengths of the sides of a triangle?

A.
7, 5, 6

B.
6, 8, 11

C.
7, 18, 11

D.
9, 12, 19

Answer 1

C

Explanation:

The general rule is that any 2 must exceed the third in order for a triangle to form. If any one is an exception, it won't work.

A will form a triangle. Any 2 exceeds the third.

B also forms a triangle. Same rule.

C does not work. 7 + 11 = 18 which is the value of the third leg.

D words Any two exceeds the 3rd.