In a geometry class, the students were asked to prove the theorem 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?
a. let each angle of a triangle be acute.
b. let two angles of a triangle be obtuse.
c. let two angles of a triangle be right.
d. let only one angle of a triangle be obtuse.