Question

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

Theorem: In a triangle, there cannot be more than one right angle.

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

let only one angle of a triangle be 90 degrees
let two angles of a triangle be 90 degrees
let each angle of a triangle be less than 90 degrees
let each angle of a triangle be greater than 90 degrees

Answer 1

I need help please!!! ill give a medal

Answer 2

you prove by contradiction by assuming the opposite is true .... and then showing that that would be impossible

Answer 3

im not good in geometry and im so lost

Answer 4

so to prove that there can be no more tan 1 right angle


you assume you have a triangle with 2 right angles.

Answer 5

I had put as my answer let two angles of a triangle be 90 degrees but I think its wrong

Answer 6

let two angles of a triangle be 90 degrees

Answer 7

it is correct

Answer 8

you assume you have a triangle with 2 right angle ... then you show that it is impossible for such a triangle to exist.


thus proving by contradiction.

Answer 9

sorry my lab top was acting up. and oh ok thank you can you help me with another one? and ill give you your medal

Answer 10

what's your question?

Answer 11

@PaxPolaris

Answer 12

if two angles are equal to the same measure, then the angles are congruent
if two angles are equal to the same measure, then the angles are supplementary
lines PQ and RS have a fixed length
lines PG and RS intersect at right angles

Answer 13

if two angles are equal to the same measure, then the angles are congruent. true

Answer 14

if two angles are equal to the same measure, then the angles are supplementary FALSE

Answer 15

don't know what to make of 3 or 4 without a picture....

Answer 16

i suppose 4 is false.


idk 3 ... what does fixed length mean?

Answer 17

I am not to sure im not even good in geometry