Question

Which of the following combinations cannot be the side lengths of a triangle?

A. 4.8 inches, 5 inches, and 1.2 inches
B. 6.7 inches, 1.1 inches, and 7.9 inches
C. 2.5 inches, 2.5 inches, and 2.5 inches
D. 2.3 inches, 3.4 inches, and 3.2 inches

Answer 1

B

Explanation:

Using the triangle side length theorem

The sum of the two smaller sides must be greater than the larger sides.

B is i the only one where the two smallest sides combined is smaller than the greater side

`6.7 + 1.1 > 7.9 {?}`

Isn't since since 7.8 is less than 7.9 so B is the answer

Answer 2

B. 6.7 inches, 1.1 inches, and 7.9 inches

Explanation: