Geometry · Parallel Lines & Angle Pairs

Transversal

HSG-CO.C.9

Definition

A line that intersects two or more coplanar lines at distinct points.

Teach it

Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.

Examples

  • Transversal t crosses two parallel lines, creating 8 angles at the two intersections.
  • A transversal crossing two lines creates pairs like corresponding and alternate interior angles.

Key rule

A transversal creates eight angles when it crosses two lines.

Memory hook

The line that cuts across two others.