A triangle has two sides that are 8cm and 13cm. What could be the length of the triangles third side

5 < x < 21

Step-by-step explanation:

The sum of the shorter sides is greater than the longest side.

If 13 is the longest side:

x + 8 > 13

x > 5

If x is the longest side:

8 + 13 > x

21 > x

Therefore, the third side is any number between 5 and 21.