The lengths of the two sticks are 3cm and 5cm respectively. The third stick should be selected and nailed into a triangle. If the length of the third stick is even, the length of the third stick is______ cm.

The lengths of the two sticks are 3cm and 5cm respectively. The third stick should be selected and nailed into a triangle. If the length of the third stick is even, the length of the third stick is______ cm.


If the third edge is greater than the difference between the two sides by 2 and less than the sum of the two sides by 8, and if the third root is even, take 4 or 6