Learning Goal: Allow students to explore, reasoning, and build connections with angles formed by parallel lines cut by transversals.

Classwork

• Lines, Transversals, and Angles (Desmos)
• Practice
• Go over Concept Quiz
  • Students complete analysis handout (pages 15-16) in order to qualify for retake. See retake policy and learning folders post for more details.

Standards:

• Common Core
  • 8.G.A.5 – Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.
• TEKS
  • G.5(A) – investigate patterns to make conjectures about geometric relationships, including angles formed by parallel lines cut by a transversal, criteria required for triangle congruence, special segments of triangles, diagonals of quadrilaterals, interior and exterior angles of polygons, and special segments and angles of circles choosing from a variety of tools
  • G.6(A) – verify theorems about angles formed by the intersection of lines and line segments, including vertical angles, and angles formed by parallel lines cut by a transversal and prove equidistance between the endpoints of a segment and points on its perpendicular bisector and apply these relationships to solve problems