A triangle with sides 9, 40, 41 is?
- Obtuse
- Equilateral
- Right triangle
- None of these
Explanation
Check using Pythagoras theorem:
9² + 40² = 81 + 1600 = 1681
41² = 1681
Since LHS = RHS, it is a right triangle.
Last verified on 13-05-2026
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