https://web2.0calc.com/questions/a-line-segment-is-broken-at-two-random-points-along-its-length-what-is-the-probability-that-the-three-new-segments-can-be-arranged-to-form#r1

See if this might help you : https://www.quora.com/A-rod-is-broken-into-three-parts-what-is-the-probability-that-the-three-parts-can-be-arranged-to-form-a-triangle

[ I think that Melody actually may have answered this one before ]

P. S. - We don't know the answer to EVERY math question...but....we know the answers to quite a few.....!!!