Let `alt=blt=c` be the lengths of the sides of a triangle. If `a^2+b^2<c^2,` then prove that `` is obtuse angled.

Let `alt=blt=c` be the lengths of the sides of a triangle. If `a^2+b^2

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

`a^(2) + b^(2) lt c^(2)`
`rArr a^(2) + b^(2) lt a^(2) + b^(2) - 2ab cos C`
`rArr cos C lt 0`
Hence, C is an obtuse angles

4 views Answered 2023-02-05 15:29

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