6. Two sides of a triangle are 10 cm and 15 cm. Determine the length of the third side from the given choices.
The third side must be greater than the difference of the other two sides and less than the sum of the other two sides.
Therefore, the third side must be:
- Greater than 15-10 = 5 cm
- Less than 15+10 = 25 cm
So, the possible lengths for the third side are between 5 cm and 25 cm.