Geometry Terms - chapter 9 Flashcards Preview

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Flashcards in Geometry Terms - chapter 9 Deck (16)
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1
Q

center of dilation

A

the intersection of the lines that connect each point of the image with the corresponding point of the preimage

2
Q

composition of transformations

A

one transformation followed by another transformation

3
Q

enlargement

A

a dilation with a scale factor greater than one

4
Q

frieze pattern

A

a pattern that has translation symmetry along a line

5
Q

glide reflection

A

a composition of a translation and a reflection across a line parallel to the translation vector

6
Q

glide reflection symmetry

A

a pattern has glide reflection symmetry if it coincides with its image after a glide reflection

7
Q

isometry

A

a transformation that does not change the size or shape of a figure

8
Q

line symmetry

A

a figure has this symmetry if it can be reflected across a line so that the image coincides with the preimage

9
Q

line of symmetry

A

a line that divides a plane figure into two congruent reflected halves

10
Q

reduction

A

a dilation with a scale factor greater than 0 but less than 1

11
Q

regular tessellation

A

a repeating pattern of congruent regular polygons that completely covers a plane with no gaps or overlaps

12
Q

rotational symmetry

A

a figure has this symmetry if it can be rotated about a point by an angle less than 360 degrees so that the image coincides with the preimage

13
Q

semiregular tessellation

A

a repeating pattern formed by two or more regular polygons in which the same number of each polygon occur, in the same order, at every vertex, and they completely cover a plane with no gaps or overlaps

14
Q

symmetry

A

a figure has symmetry if it can be transformed so that the image coincides with the preimage

15
Q

tessellation

A

a repeating pattern of plane figures that completely covers a plane with no gaps or overlaps

16
Q

translation symmetry

A

a figure has this symmetry if it can be translated along a vector so that the image coincides with the preimage