Key Concepts:
- Vertical Angles – When two lines intersect, the opposite (non-adjacent) angles are equal.
- Supplementary Angles – Two angles whose sum is (180°).
- Complementary Angles – Two angles whose sum is (90°).
- Adjacent Angles – Two angles that share a common side and vertex.
- Corresponding Angles (angles in the same relative positions when two lines are intersected by a transversal) are equal if and only if the two lines are parallel.
- Alternate Interior Angles (interior angles on opposite sides of the transversal) are equal if and only if the two lines are parallel.
- Same-Side Interior Angles (interior angles on the same side of a transversal) add up to (180°) if and only if the two lines are parallel.
Skills Covered:
- Identifying different types of angles in geometric figures.
- Using properties of angles to find unknown angles.
- Applying transversal properties to solve for unknown variables in parallel line diagrams.