Which statement proves a triangle cannot have sides of 3 cm, 4 cm, and 9 cm I know it's not the first one.

3 + 4 > 9

Step-by-step explanation:

Now, when we have 3 sides of a triangle, the sum of the length of any two sides must be greater than the third side

Thus, we have that;

3 + 4 > 9

This is because the above is impossible

Others are quite possible mathematical expressions

this was already solved by me with a different person. if you look it up in the search bar at the top of the page, you will get the answer.

step-by-step explanation:

go hook jvc hgv cj xk jvc 6756