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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
PDF
DOC
TNS
Regents-Lines and Angles 2
GE
14 TST
PDF
DOC
TNS
Regents-Lines and Angles 3
A
6 TST
PDF
DOC
TNS
Regents-Line and Angle Proofs
GE
3 TST
PDF
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
Practice-Lines and Angles 4 20 WS
PDF
Practice-Lines and Angles 5 6 WS
PDF
Practice-Line and Angle Proofs 6 WS
PDF
VIDEOS Identifying collinear points VID
Naming lines, segments, and rays VID
Identifying parallel or skew lines
Relating parallel and perpendicular lines VID
Classifying angles VID
Identifying angle pairs VID
Using the Vertical Angles Theorem VID
Using the Congruent Supplements Theorem
Using the segment addition postulate VID
Using the angle addition postulate VID
 
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