Question

Decide whether each set of numbers is a triangle. Answer Yes or No.

Answer 1

1) Yes

3) No

5) Yes

7) No

9) No

Explanation:

1) 9 + 12 > 15 correct

3) 9 + 11 > 20 incorrect

5) 28 + 47 > 70 correct

7) 5 + 10 > 15 incorrect

9) 12 + 2.2 > 14.3 incorrect