Common Core · High school
HSG-CO.A.1
High school — Know precise definitions of angle, circle, perpendicular line, parallel line and line segment.
The skill that covers it
What a student should be able to do
- Name corresponding, alternate interior, alternate exterior and co-interior angle pairs.
- Find unknown angles when a transversal crosses two parallel lines.
- Decide from one angle pair whether two lines are parallel.
- Solve for a variable in an algebraic angle relationship and relate perpendicular lines to right angles.