CC G.CO.9

Prove geometric theorems. 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.

Aligning Assessment & Planning Instruction

Student Resources

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Teacher Resources

• Background Knowledge/Reference

  Angles formed by parallel lines and a transversal

  Activity Overview Students explore relationships in various angles formed by 2 parallel lines and a transversal.

  TI-83/84 Parallel lines Transversal Supplementary

  Contributed by webbdi

Assessment

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