SuicideFuel Math thread problem (official)

[NiggerAnnihilator]

fuck math it ruined me throughout high school

 

[Ahnfeltia]

Given are five line segments (or equivalently any five positive numbers aka lengths) so that any three of them can be put together to make a (nondegenerate) triangle. Prove that at least one of those triangles must be acute.

Spoiler: hints

Spoiler: hint 1

triangle inequality

Spoiler: hint 2

what does the law of cosines tell you about acute triangles?

 

[SupremeAutist]

I forget most of the non-simple math I learned back in school already and I only graduated 2 years ago

 

[Scatius Deletus]

5

 

[iObeyWario]

Over for retardcels

 

[iObeyWario]

Math sucks, hated my bitch of a math teacher and It was difficult for me