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STANDARD G.CO.C.9

Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints.

WORKSHEETS Regents-Lines and Angles 1
GEO
6 TST
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DOC
TNS
Regents-Lines and Angles 2
GE
14 TST
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DOC
TNS
Regents-Lines and Angles 3
A
6 TST
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DOC
TNS
Practice-Lines and Angles 1 5 WS
PDF
Practice-Lines and Angles 2 10 WS
PDF
Practice-Lines and Angles 3 10 WS
PDF
VIDEOS Identifying angle pairs VID
Using the Vertical Angles Theorem VID
Using the Congruent Supplements Theorem
 
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