Question

Can you help me check this question?
I got option D.
@jim_thompson5910

Answer 1

@jim_thompson5910

Answer 2

yes, D is how you show angles marked 2 are congruent

Answer 3

:DD Thank you, everyone kept saying "C" and I'm like "No..., no"..!

Answer 4

C is true, but we want to show the *3* angles marked 3,1,2 at Q add up to 180 deg.

Answer 5

Thank you ! :)

Answer 6

I thought corresponding angles formed by parallel lines and their transversal are EQUAL not supplementary.

Answer 7

aum, you are correct. this one *might* have a typo (or they are thinking a lot differently than I do)

Answer 8

A is true, but I don't see a way to use it.

C is true, but we would need to do a bit of explaining first...

so C might be what they want.

Answer 9

Yeah none of the choices seem good.

But in the diagram they have already concluded angles marked 1 are equal and angles marked 3 are equal. So the only step that is remaining is to prove angles 1 + 2 + 3 = 180 degrees. So C comes closest, except there are three angles that are supplementary and not two angles as choice C says.

Answer 10

I would probably pick C except the wordings should be:
If two or MORE angles form a straight angle, then they are supplementary.

With that we would have proved that at point Q, angles marked 1 + 2 + 3 = 180 degrees and therefore, the sum of the interior angles of the triangle marked 1 + 2 + 3 = 180 degrees.

Answer 11

:/ I thought it was option "D"... >.<

Answer 12

Option D says corresponding angles are supplementary. But corresponding angles are equal not supplementary.

Read the second paragraph here: http://www.mathsisfun.com/geometry/corresponding-angles.html

Answer 13

Corresponding angles can be supplementary only when each of the corresponding angles equal 90 degrees (a special case). But in general, corresponding angles are equal.