hellokitty357
The figure below shows a pair of parallel oil pipelines, PQ and RS. EF and GH are maintenance walkways that are parallel to each other.
What is the measure of angle GMS?
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hellokitty357
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hellokitty357
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@ShotGunGirl
ShotGunGirl
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Oh I'm sorry<3 I don't know this one. Try @ParthKohli or @lgbasallote I'm really sorry.
lgbasallote
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yeah sure tag the poor lgba :(
hellokitty357
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@AccessDenied
eyust707
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It would be 180 - 60
eyust707
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which is...
hellokitty357
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120..but can you explain to me why? becuase I want to learn for next time!
eyust707
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sure
hellokitty357
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@eyust707 ..is it 120? how?
eyust707
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if you have 4 parallel lines like this
|dw:1339087707750:dw|
eyust707
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all the intersections are exactly the same
eyust707
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|dw:1339087829646:dw|
eyust707
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so those angles are exactly the same
hellokitty357
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oh ok!
eyust707
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|dw:1339087867430:dw|
eyust707
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so that angle is 60
eyust707
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and they told us its against a line
eyust707
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|dw:1339087912601:dw|
eyust707
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so from there to there is 180
eyust707
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all thats left is the difference
hellokitty357
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oh ok I see! terrific..there was another way I looked at it too! if you look at the picture angle K has one arc which measures 60 degrees, and angle M has two arcs! so I was thinking that I could multiply 60 times 2!
hellokitty357
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will that technique work on all equations?
eyust707
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no!!
eyust707
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the arc simply mean that they are different angles
eyust707
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they dont have to be different by a factor of 2 tho
hellokitty357
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oh ok I see! thanx ;)
eyust707
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=)