Education Technology


Published on 08/03/2010

Activity Overview

Students reflect figures over the x- and y-axes, rotate figures 90°, 180°, and 270° counterclockwise about the origin, and write rules for each reflection and rotation.

Key Steps

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    In Problem 1, students investigate reflections.

    Students will explore the triangle and its reflection to discover that the x-values of pre-image and image points are equal, while the y values are opposites.

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    In Problem 2, students will explore rotations of a quadrilateral.

    ABCD is drawn in Quadrant 1. Students find and record the coordinates of both figures and discover the properties of rotated figures.