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Mathematics 7 Online
OpenStudy (firejay5):

I would love help on my homework on proofs and I don't really understand them, so I would really love help on it. I will give you a medal for your help and appreciation.

OpenStudy (firejay5):

OpenStudy (firejay5):

@phi

OpenStudy (firejay5):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

start with what is literally given

OpenStudy (firejay5):

got it #2

jimthompson5910 (jim_thompson5910):

you tell me

OpenStudy (firejay5):

definition of right angle right

jimthompson5910 (jim_thompson5910):

yes or perpendicular lines

jimthompson5910 (jim_thompson5910):

either one works in my opinion

jimthompson5910 (jim_thompson5910):

oh wait, you would probably start off with perpendicular, the move to right angles

OpenStudy (firejay5):

so perpendicular lines

jimthompson5910 (jim_thompson5910):

yeah

OpenStudy (firejay5):

3 is complementary angles

jimthompson5910 (jim_thompson5910):

no that would be the definition of right angles

jimthompson5910 (jim_thompson5910):

in statement 2, they use "right angles", so that's why it makes sense to have that reason in #3

OpenStudy (firejay5):

definition of congruent angles for #4

jimthompson5910 (jim_thompson5910):

that's for #5

OpenStudy (firejay5):

4 is vertical angles

jimthompson5910 (jim_thompson5910):

no look at step 3, and use that to figure out #4

OpenStudy (firejay5):

corresponding angles

jimthompson5910 (jim_thompson5910):

if a = b and c = b, then a = c what property did I just use?

OpenStudy (firejay5):

transitive property is #4

jimthompson5910 (jim_thompson5910):

closer, but no

OpenStudy (firejay5):

symmetric property

OpenStudy (firejay5):

#4 is symmetric property

jimthompson5910 (jim_thompson5910):

no, what's the idea that if x = 2 then 4x turns into 4*2

OpenStudy (firejay5):

substitution property

jimthompson5910 (jim_thompson5910):

bingo

OpenStudy (firejay5):

4 is substitution property

OpenStudy (firejay5):

6 is definition of parallel lines right

jimthompson5910 (jim_thompson5910):

no

OpenStudy (firejay5):

what is it then

OpenStudy (firejay5):

definition of parallel then

jimthompson5910 (jim_thompson5910):

look through your notes

jimthompson5910 (jim_thompson5910):

how are angles 1 and 2 related? what type of angles are they?

OpenStudy (firejay5):

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jimthompson5910 (jim_thompson5910):

how are angles 1 and 2 related? what type of angles are they?

OpenStudy (firejay5):

Congruent

jimthompson5910 (jim_thompson5910):

what else

OpenStudy (firejay5):

and right angles

OpenStudy (firejay5):

I mean #6 is explanatory it's parallel, because it has the parallel symbol

OpenStudy (firejay5):

How is the definition of parallel or parallel lines not right

jimthompson5910 (jim_thompson5910):

hint: 1 and 2 are corresponding angles

OpenStudy (firejay5):

I see that 6 is corresponding angles

jimthompson5910 (jim_thompson5910):

yes so if they are congruent, then how does that prove the lines are parallel?

OpenStudy (firejay5):

the corresponding angles are equal if the lines are parallel

OpenStudy (firejay5):

so am I still wrong or was I right?

jimthompson5910 (jim_thompson5910):

basically the idea if the corresponding angles are congruent, then the lines are parallel so this is using the converse of the corresponding angles postulate

OpenStudy (firejay5):

6 is the converse of the corresponding angle postulate

jimthompson5910 (jim_thompson5910):

yes

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