Question

10. Which of the following could be the lengths of the three sides of a triangle?

A 1 cm, 2 cm, 3 cm
B. 3 in., 3 in., 7 in.
C. 4ft, 8 ft, 12 ft
D. 5 cm, 7 cm, 9 cm

Answer 1

Answer: D

Explanation:

the sum of any two sides of a triangle must be greater than the third side.

5 + 7 = 12

12 > 9