In a geometry class, the students were asked to prove the theory below by contradiction. theorem: a triangle has at the most one obtuse angle.
heather begins the proof with an assumption. which statement will she most likely use as an assumption.
1. let two angles of a triangle be obtuse.
2. let each angle of a triangle be acute.
3. let only one angle of a triangle be obtuse.
4. let two angles of a triangle be right.