Angles
A.1 Supplementary and Vertical Angles
Big Idea
Understand why vertical angles are congruent using properties of supplementary angles.
A.2 Corresponding Angles
Big Idea
Discover that corresponding angles are congruent.
A.3 Alternate Interior and Same Side Interior Angles
Big Idea
Discover the relationship between same-side interior and alternate interior angles when two parallel lines are cut by a transversal.
A.4 Missing Angles
Big Idea
Use angle relationships to find missing angles when two parallel lines are cut by a transversal.
A.5 Angle Sum Theorem
Big Idea
Explain why the sum of the measures of the interior angles of a triangle is 180 degrees.
A.6 Exterior Angle Theorem
Big Idea
Apply the exterior angle theorem to find missing angles of a triangle.