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Geometry Chapter 9 K

Extending Transformational Geometry

TermDefinition
isometry a transformation that does not change the shape or size of a figure
composition of transformations one transformation followed by another
glide reflection the composition of a translation and a reflection across a line parallel to the translation vector
symmetry exists when a figure has a transformation that will take it to itself
line symmetry exists when a figure can be reflected across a line resulting in itself
line of symmetry a line that divides a figure into 2 congruent parts
rotational symmetry exists when a figure can be rotated and still look like itself
translation symmetry exists when a figure can be translated and still look like itself
frieze pattern a pattern that has translation symmetry along a line
glide reflection symmetry exists when a figure looks like itself after it has been through a glide reflection
tessellation a repeated pattern that completely covers a plane with no gaps or overlaps
enlargement a dilation where the scale is bigger than 1
reduction a dilation where the scale is less than 1
Created by: stacykeener
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