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Geometry Chapter 9 K
Extending Transformational Geometry
Term | Definition |
---|---|
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 |