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Angle Relationships and Parallel Lines

7th Grade · Math · Open Global Math

9 lessons

Goal

Identify and calculate unknown angles using complementary, supplementary, vertical, and parallel line transversal relationships with algebraic equations.

9 lessons
0 of 9 done
  1. Identifying Adjacent, Complementary, and Supplementary AnglesUp next
  2. Finding Unknown Angles Using Complementary and Supplementary RulesNot started yet
  3. Vertical Angles and Linear PairsNot started yet
  4. Solving Linear Equations with Intersecting Lines and Angle PairsNot started yet
  5. Parallel Lines and Transversals: Alternate Interior and Exterior AnglesNot started yet
  6. Alternate, Corresponding, and Co-Interior Angles on Parallel LinesNot started yet
  7. Solving Multi-Step Algebraic Equations with Parallel Lines and TransversalsYou are here
  8. Proving Lines Are Parallel Using Angle RelationshipsNot started yet
  9. Combining Parallel Line Rules with Triangles and QuadrilateralsNot started yet
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Learning standards covered

GlobalOGM.8.GEO.1Open Global Math Standards 2026™ · 7th Grade

Identify, analyze, and use geometric relationships of lines and angles: complementary, supplementary, vertical, adjacent, corresponding, alternate interior, and co-interior angles formed by parallel lines cut by a transversal, setting up and solving equations for unknown angles.