Question

Which three lengths could be the lengths of the sides of a triangle?
A) 11cm, 11cm, 24cm
B) 18cm, 12cm, 9cm
C) 9cm, 19cm, 10cm
D) 4cm, 7cm, 23cm

Answer 1

If any side is greter or equal to the sum of the other 2 sides then it is not a triangle.

So  A is not a triangle because 24 > 11 + 11

For C 19 = 10 + 9  -  not a triangle
D:- 23 > 4 + 7   Not a triangle.

Only B is a triangle

Answer 2

The answer is B. 18cm, 12cm, and 9cm.