Education Technology

# Activities

• ##### Subject Area

• Math: Geometry: Transformational Geometry

6-8
9-12

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

TI-Nspire™ CX
TI-Nspire™ CX CAS

4.4

• ##### Report an Issue

Rotations - Lesson Bundle

#### Activity Overview

In the Rotations “lesson bundle”, students will explore rotations and their properties. Throughout the lessons, students are encouraged to make observations related to their investigations, leading them to discovering the properties of rotated figures. Explorations can be done via rotations on a grid and without a grid.

#### Objectives

Students will:

• Learn to identify and perform rotations with technology and without technology.
• Explore the relationship between the corresponding parts of the pre-image and image triangles.
• Verify experimentally the properties of rotations with and without a grid.
• Explain how underlying properties relate to rotation.
• Understand the effects that a rotation has upon a triangle by easily manipulating the triangle.
• Discover how to rotate a figure by hand.

#### Vocabulary

• Rotation
• Conjecture
• Image/Pre-image
• Corresponding sides
• Corresponding angles
• Area
• Perimeter
• Slope
• Horizontal
• Vertical
• Parallel lines
• Perpendicular lines
• Vector