Question

In a geometry class, the students were asked to prove the theorem below by contradiction:
Theorem: A quadrilateral cannot have three and only three right angles.
Heather begins the proof with an assumption. Which statement will she most likely use as an assumption?

Answer 1

Select one:
a. Let one angle of a quadrilateral be acute and the other three angles obtuse.
b. Let all angles of a quadrilateral measure 90° each.
c. Let all angles of a quadrilateral be acute.
d. Let one angle of a quadrilateral be obtuse and the other three angles measure 90° each.

Answer 2

@ganeshie8 I need ur help

Answer 3

yay thnx

Answer 4

at first I thought it was A

Answer 5

in proof by contradiciton, u need to assume the opposite of wat u need to prove

Answer 6

so what will it be

Answer 7

yu want o prove
Theorem: A quadrilateral cannot have three and only three right angles.

Answer 8

so assume opposite of it :-
A quadrilateral has 3 right angles, and one acute/obtuse angle

Answer 9

So is it C then