The lengths of the sides of a triangle are \(x, 21\) and \(40\), where \(x\) is the shortest side. A possible value of \(x\) is:

Question and options

The lengths of the sides of a triangle are

x, 21

and

40

, where

x

is the shortest side. A possible value of

x

is:

Correct answer: B - 20

Triangle inequality: x+21>40 so x>19; x shortest so x<21. Only x=20 works (19 gives degenerate 19+21=40).