Question

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?

Answer 1

is this multiple choice

Answer 2

Proof by contradiction !
so begin with an assumption that contradicts theorem :
"Lets assume two angles in a triangle are obtuse"

Answer 3

ok