Question

Fan and Medal, help please ):

In a geometry class, the students were asked to prove the theorem below by contradiction:

Theorem: In a quadrilateral, there cannot be more than three obtuse angles.

Heather begins the proof with an assumption. Which statement will she most likely use as an assumption?

Let one angle of a quadrilateral be acute and the other three angles obtuse.

Let all angles of a quadrilateral be obtuse.

Let only one angle of a quadrilateral be obtuse.

Let one angle of a quadrilateral be obtuse and the other three angles acute.

Answer 1

ok do you know how to prove using contradiction ?

Answer 2

not really ):

Answer 3

Say that all angles are obtuse, going against what you are proving.

Answer 4

so you contradict the statement.

Answer 5

Then you would go on to prove why your contradiction is impossible.

Answer 6

so B?

Answer 7

yes...