Which set of three numbers could be the side lengths of an triangle 3,5,9 2,4,6 2,4,8 3,5,7

3,5,7

Step-by-step explanation:

to find which set it is you have to add the first too like this

3+5 >7 if greater than 7 move on too this

5+7>3 if greater move on to this

3+7>5 if greater that means it is a set you can use