Which combination of three side lengths will NOT form a triangle? 15 cm, 8 cm, 6 cm

9 mm, 6 mm, 5 mm

12 in, 9 in, 6 in

4 ft., 5 ft., 3 ft.

The first set.

Step-by-step explanation:

15 cm, 8 cm and 6 cm, because 15 > 6 + 8.

15 cm, 8 cm, 6 cm

Step-by-step explanation:

This is because the third length will always have to be less than the first and second added together. When you take 8 plus 6 the answer is 14 but 15 is larger than 14 so you cannot make a triangle out of that.

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!