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Mathematics 19 Online
OpenStudy (anonymous):

help!!

OpenStudy (anonymous):

OpenStudy (anonymous):

i'm not entirely sure how to tackle this

OpenStudy (owlcoffee):

Well, all you have to do is write the reasning made to conclude the statement written,

OpenStudy (anonymous):

i dont understand it. can you walk me through?

OpenStudy (owlcoffee):

okay, it is a little tricky to help people with logic and proofs because it is a little abstract. We are given that <1 is supplementary to <2 and 2 is supplementary to <3. Two supplementary angles are a pair of angles that sum up to 180 degrees. so that means: \[<1+<2=180\] \[<2+<3=180\] is a "given" statement.

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

are they asking me for the definitions? so like 2. would be the definition of supplementary angles?

OpenStudy (anonymous):

3. would be substitution

OpenStudy (anonymous):

and so on? or do they want numbers?

OpenStudy (owlcoffee):

in 3. it is "transitive propety" because: \[<1+<2=180=<2+<3\] so therefore: \[<1+<2=<2+<3\]

OpenStudy (anonymous):

so that's what they are asking for?

OpenStudy (owlcoffee):

yes, all you have to do is justify what they do on the proof.

OpenStudy (anonymous):

i can't figure out number 4. 4. ?? 5. addition/subtraction property 6. definition of congruent angles

OpenStudy (owlcoffee):

well, it just sustracted "<2" on both sides.

OpenStudy (anonymous):

substitution property of equality ?

OpenStudy (anonymous):

OH.

OpenStudy (anonymous):

DUH its the subtraction property

OpenStudy (owlcoffee):

good reasoning. and that's correct.

OpenStudy (anonymous):

what a tough one that was lol

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