When the two sides of a triangle are 8 cm and 4 cm long, the length of the third side may be () cm A. 3B. 4C. 7

When the two sides of a triangle are 8 cm and 4 cm long, the length of the third side may be () cm A. 3B. 4C. 7

8-4 < the third side < 8 + 4, so 4 < the third side < 12, that is, the third side is between 4cm and 12cm (excluding 4cm and 12cm)