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Mathematics 10 Online
OpenStudy (anonymous):

**WILL MEDAL** The lines a and b intersect at point D. What is the value of z? z = ? http://static.k12.com/calms_media/media/1561000_1561500/1561011/1/78faf1bd5c48a3fe68a305b005ddfd42afbabb12/MS_IMC-1401104-109024.jpg

OpenStudy (anonymous):

ok, the inner angles have a special rule to them. the side that D is on in the cross will equal the angle opposite of that. taking that knowledge, 5z+8=4z+20. make z by itself and there you go

OpenStudy (ribhu):

vertically opposite angles, z = 12 degreees

OpenStudy (anonymous):

Thx guys c:

OpenStudy (ribhu):

yaa sure u ask

OpenStudy (anonymous):

no problem

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