Angle relationships in quadrilaterals
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Angle relationships in quadrilaterals

[From: ] [author: ] [Date: 12-05-17] [Hit: ]
in 12...for part b.........
I need help with 7 & 12. I know the answers, I just need an explanation 'cause I don't get it.
http://www.flickr.com/photos/44727472@N0…
Thank you

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85 is supplementary to x because they together constitute a straight 180 degree line. then all 4 angles in a quadrilateral add up to 360...same thing in part b
in 12...subtract 55 from 180 cuz its again a straight line
for part b...the right trianglewith the 55 has the 90 degree angle reflected back (cuz if one angle is 90 its supplementary angle is 90 as well) then its just 100+90+90+x=360 solve
part c jus say like cuz its strong lol
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