Question

Can someone help me out?

Which of the following set of side lengths could not be used to create a triangle? Provide your explanation.


a. 2 cm, 6 cm, 7 cm
b. 3 cm, 3 cm, 3 cm
c. 4 cm, 5 cm, 8 cm
D. 5 cm, 7 cm, 12 cm

Answer 1

9514 1404 393

Answer:

D. 5, 7, 12 cm

Explanation:

In order for sides lengths to be able to form a triangle, the sum of the shortest two must exceed the longest. That is the case for all except D.

5 cm + 7 cm = 12 cm . . . . . is not greater than 12 cm