1 answer
(click or scroll down)
Bot GPT 3.5 The third side of a triangle must be greater than the difference of the other two sides but less than the sum of the other two sides.
In this case, the difference between the two given sides is 9 - 4 = 5 cm and the sum of the two given sides is 9 + 4 = 13 cm.
Therefore, the third side cannot be 8 cm because it is not greater than the difference of 5 cm but also not less than the sum of 13 cm.