Question

If a triangle has the lengths 7 and 21, find the range of lengths that the

third side could be to form a triangle.
7 14 14 6

Answer 1

0 < x < 28

Explanation:

If a triangle has 2 sides, with lengths 7 and 21, the third side must -

have a length longer than zero and less than (7+21) = 28

so if the 3rd side has length x, then

0 < x < 28