Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Points, Lines and Angles

9-12

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™
• TI-Nspire™ CAS
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.0

## Angle Relationships

#### Activity Overview

In this activity, students explore the angle relationships that exist when two lines intersect. They begin by exploring vertical angles and linear pairs, and then expand their study to two lines and a transversal. They will see what relationships hold true when the two lines intersected by a transversal are parallel, and then use their newly gained knowledge to find missing angle measures in diagrams, using the device’s tools to confirm their results.

#### Key Steps

• In problem 1, students investigate the relationship of angles when two lines intersect.

• Next, they look at the angle relationships formed when two parallel lines are intersected by a third line.

• Finally, students bring this knowledge together to identify angle measures.