A triangle has side lengths of 10 cm, 24 cm, and 25 cm. Classify it as acute, obtuse, or right.

FYI This does not concern the Pythagorean theorem.

The FYI tells you that it is not a right triangle. The only way I know how to do this is with the Cos law. If you don't know what that is, you will have to draw it to scale.

The cos law tells me that it is acute (all three angles are under 90o). If you need me to show that to you, leave a note for me.