Question

which set of side lengths could not be used form atriangle? a. 5cm, 7 cm , 10 cm b. 4 cm , 10cm, 15cm c. 3cm, 8 cm , 6cm d. 12cm, 8cm , 9 cm

Answer 1

B. 4 cm, 10 cm, and 15 cm

According to two sides, 4, and 10 cm, the third side has to be between
10-4 and 10+4
6<side length<14

However, the side length is 15 cm, greater than 14 cm, so it is not a triangle.

Hope this helps :)