Browse by Grade & Topic: Similarity and Transformations

Dilate a figure and investigate its resized image. See how scaling a figure affects the coordinates of its vertices, both in (x, y) form and in matrix form.

Reshape and resize a figure and examine how its reflection changes in response. Move the line of reflection and explore how the reflection is translated.

Divide a right triangle at the altitude to the hypotenuse to get two similar right triangles. Explore the relationship between the two triangles.

Translate a figure horizontally and vertically in the plane and examine the matrix representation of the translation.

Rotate, reflect, and translate a figure in the plane. Compare the translated figure to the original figure.

Vary the scale factor and rotation of an image and compare it to the preimage. Determine how the angle measures and side lengths of the two figures are related.