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# Understand congruence and similarity using physical models, transparencies, or geometry software.

### Lessons for this standard

Resources cannot be aligned to this standard, browse sub-standards to find lessons.

### Related standards

- This standard is part of: 8.G
- This standard is derived from: CCSS.Math.Content.8.G.A

#### More specific sub-standards

Verify experimentally the properties of rotations, reflections, and translations:

Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them.

Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates.

Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.

Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.

#### Similar standards elsewhere

Understand congruence and similarity using physical models, transparencies, or geometry software.

Understand congruence and similarity using physical models, transparencies, or geometry software.

Understand congruence and similarity using physical models, transparencies, or geometry software.

Understand congruence and similarity using physical models, transparencies, or geometry software.

Understand congruence and similarity using physical models, transparencies, or geometry software.