HARD QUESTION!!

Question

Aileen is trying to correctly classify a triangle by its angle. Her only information is that the triangle has at least one acute angle. Aileen says this is must be an acute triangle. Is she right? Explain.

Answer 1

A triangle with 3 acute angles is called acute.

A triangle with 2 acute angles and 1 obtuse is called obtuse.

 

Since only one angle is identified, the triangle cannot be classified by angles.