Question

Which of these 3 lengths cannot
be sides of a triangle? *
20cm, 25cm, 15cm
3.5cm, 9cm, 5.5cm
5cm, 9cm, 12cm
8.5cm, 11cm, 3.5cm​

Answer 1

the sum of two sides of triangle is always greater than third side.

hence,

in second e.g.

3.5+5.5=9

it is not greater than third side which is 9 cm.

so these 3 length cant be sides of the triangle

Answer 2

Answer:

3.5cm,9cm,5.5cm

Step-by-step explanation:

as sum of 2 side of a triangle should always be greater than the third side

3.5+5.5=9

and9=9

hence 3.5cm,9cm,5.5cm these units cannot be used to make a triangle