Please i need help fast! Which of the following sets of numbers could not represent the three sides of a triangle?

{7, 21, 28}

Step-by-step explanation:

In order for three sides to add up to a triangle, the two shorter sides must have a sum of greater than the longest side.

Since 7 + 21 = 28, and 28 = 28, that group of sides cannot add up to be a triangle.

Have a nice day!

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol