Bonjour j'aurai besoin d'aide pour cet exercice :)

1) On considère un triangle ABC tel que BC=7cm ; BCA = 37° et CBA = 53°
Le triangle ABC est-il rectangle ?

2) On considère le triangle DEF tel que DE = 30mm ; EF = 50mm et FF = 40mm.
Le triangle DEF est-il rectangle ?
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