9-4 Compositions of Isometries. Isometry: a transformation that preserves distance or length (translations, reflections, rotations) There are 4 kinds.

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Presentation transcript:

9-4 Compositions of Isometries

Isometry: a transformation that preserves distance or length (translations, reflections, rotations) There are 4 kinds of isometries

Reflections Across Parallel Lines

Problem 1: Composing Reflections Across Parallel Lines

Reflections Across Intersecting Lines

Problem 2: Composing Reflections Across Intersecting Lines

Glide Reflection: is the composition of a translation (a glide) and a reflection across a line parallel to the direction of translation.

Problem 3: Finding a Glide Reflection T E X

T E X