In this activity, students will discover how pictures formed by graphing ordered pairs can be stretched (and shrunk) by multiplying (and dividing) the coordinates.

In this lesson, students will graph translations (slides) and reflections (flips) on a coordinate plane. The lesson is introduced by having students move across the room to demonstrate translations and reflections.

This lesson provides an introduction to geometric transformations -- reflections, rotations, translations, and glide reflections. The accompanying applet allows students to perform a transformation and then analyze the relationship between the original object and the resulting image. A discussion of various kinds of symmetry is included. A student worksheet, lesson extensions, and guided discussions are provided.

This applet allows the user to explore the world of translations, reflections, and rotations. It allows the user to translate triangles, squares, and parallelograms on both the x and y-axes. The user can also reflect the figure around x values, y values, and the line x = y. The applet will also rotate the figure any given number of degrees.

For this lesson students will use graphing calculators(TI-83 Plus) to find transformations of polygons.

In this lesson, students know an informal proof of why dilations are degree-preserving transformations. Students know an informal proof of why dilations map segments to segments, lines to lines, and rays to rays.

In this lesson, students verify the converse of the Fundamental Theorem of Similarity experimentally. Students apply the Fundamental Theorem of Similarity to find the location of dilated points on the plane.

In this lesson, students describe the effect of dilations on two-dimensional figures using coordinates.