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Activity
Texas Instruments

Texas Instruments: Parallel or Perpendicular What's Your Inclination?

For Teachers 9th - 10th Standards
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. [Requires Adobe Reader.]
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Activity
Texas Instruments

Texas Instruments: Parallel and Perpendicular Slopes

For Teachers 9th - 10th Standards
This activity is for use as a formative assessment tool after the introduction and overview of parallel and perpendicular slopes.