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Mathematics 20 Online
OpenStudy (anonymous):

why is it when i ask a question i am the least one to get an answer this is so wrong can someone please help me

OpenStudy (anonymous):

given: <3 and <4 form a linear pair m<1+m<2+m<3=180. Prove: m<4=m<1+m<2

jimthompson5910 (jim_thompson5910):

What does it mean when they say " <3 and <4 form a linear pair"

OpenStudy (anonymous):

i wish i know but im working on proofs and im not entirely sure

jimthompson5910 (jim_thompson5910):

say we start with a straight line |dw:1410987272637:dw|

jimthompson5910 (jim_thompson5910):

If we then attach a segment or ray to it, we get this |dw:1410987293875:dw|

jimthompson5910 (jim_thompson5910):

These two angles here |dw:1410987311434:dw| form a linear pair because they are a) adjacent b) supplementary (they add to 180 degrees)

jimthompson5910 (jim_thompson5910):

sound familiar? or no?

OpenStudy (anonymous):

yes

jimthompson5910 (jim_thompson5910):

so what equation can you form when they say " <3 and <4 form a linear pair"

OpenStudy (anonymous):

<3+<4=180

jimthompson5910 (jim_thompson5910):

so let's say we start with what is given m<1+m<2+m<3=180

jimthompson5910 (jim_thompson5910):

that equation is missing angle 4 so let's add it to both sides m<1+m<2+m<3+m<4=180+m<4

jimthompson5910 (jim_thompson5910):

We know that m<3+m<4=180 since they are a linear pair, this means m<1+m<2+m<3+m<4=180+m<4 turns into m<1+m<2+180=180+m<4 finally you subtract 180 from both sides to get m<1+m<2=m<4 which is the same as m<4 = m<1 + m<2

jimthompson5910 (jim_thompson5910):

btw this sounds like the remote interior angle proof

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