Question

Which is the possible length of the third side of a triangle given the first two sides are 5 cm and 18 cm?
*
15 cm
23 cm
25 cm
38 cm

Answer 1

The third side must be greater than the difference of the first two sides and less than the sum of the first two sides.

So the possible length of the third side falls within: 13 cm < x < 23 cm

Therefore, the possible lengths are 15 cm or 18 cm.