In a triangle ABC AB = 3cm AC = 4cm BC = 5cm. Which corner of the triangle is the largest?

There is a larger angle in the triangle opposite the larger side.

The aspect ratio ∆ABC can be written as a double inequality: AB <AC <BC. The larger side of the triangle is the BC side. Then the larger angle of the triangle lies against this side, and this is ∠BAC or ∠A.

Answer: The largest angle ∆ABC is ∠A.



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