This activity has students discover the relationship between parallel and perpendicular lines and their slopes. After constructing these objects using CABRI Geometry II for the TI-89, slopes are measured. (Topic - parallel and perpendicular lines)
Before the Activity
Students should have access to the TI-89/TI-89 Titanium.
During the Activity
Students will construct multiple lines using CABRI Geometry II and determine whether the lines are parallel, perpendicular, or neither. This activity can be teacher directed or discovery.
After the Activity
Review student answers:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary