• ##### Device

TI-Nspire™ CX,TI-Nspire™ CX CAS,TI-Nspire™ Navigator™,TI-Nspire™,TI-Nspire™ CAS

• ##### Software

TI-Nspire™,TI-Nspire™ CAS

• ##### TI-Nspire Version

3.0

Geometry: Points, Lines, and Planes

by Texas Instruments - Action Consequence Lesson
Published on August 30, 2011

#### Objectives

• Students will identify parallel lines and planes.
• Students will identify perpendicular lines and planes.
• Students will recognize skew lines.
• Students will discuss the intersection of planes.
• Students will attend to precision (CCSS Mathematical Practice).
• Students will look for and make use of structure (CCSS Mathematical Practice).

#### Vocabulary

• Parallel lines
• Perpendicular lines
• Collinear
• Noncollinear
• Plane
• Skew

This lesson involves use of a cube to represent space. Points and segments flash when clicked. As a result students will:

• Click on vertices of a cube to identify planes, including an interior plane.
• Click on segments of a cube to identify parallel, perpendicular, and skew segments.
• Rotate the cube to visualize the relationships from different perspectives.
• Manipulate planes in space to show the intersection of two planes is a line, and the intersection of three planes can be a point or a line.