# Classroom Activities

• ##### Subject Area

• Math: Geometry: Transformational Geometry

9-12

45 Minutes

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

TI-Nspire™
TI-Nspire™ CAS

3.2

• ##### Report an Issue

Transformations: Translations

Published on 08/30/2011

#### Activity Overview

Investigate what a triangle will look like when it is translated horizontally or vertically.

#### Objectives

• Students will identify a translation as an isometry, also called a congruence transformation.
• Students will identify which properties (side length, angle measure, perimeter, area, and orientation) of a figure are preserved in a translation and which are not.
• Students will generalize the relationship between the coordinates of a pre-image and its image in a translation in the coordinate plane.
• Students will look for and make use of structure (CCSS Mathematical Practice).

#### Vocabulary

• pre-image
• image
• transformation
• translation
• congruent figures
• congruence transformation
• isometry