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Lessons 9-4 through 9-6 Vocabulary

Across
(p. 663) A figure has _____ symmetry if the figure can be mapped onto itself by a rotation of 180°.
(p. 663) A figure in the plane has rotational symmetry (or radial symmetry) if the figure can be mapped onto itself by a rotation between 0° and 360° about the center of the figure, called the ______ of symmetry (or point of symmetry).
(p. 662) A figure in the plane has reflectional symmetry (or ____ symmetry) if the figure can be mapped onto itself by a reflection in a line, called a ____ of symmetry (or axis of symmetry).
(p. 653) Be sure to compose two transformations according to the _____ in which they are given.
(p. 651) A(n) _____ reflection is the composition of a translation followed by a reflection in a line parallel to the translation vector.
(p. 663) The _________ of symmetry (or angle of rotation) is the smallest angle through which a figure can be rotated so that it maps onto itself.
(p. 672) A dilation or _______ is a similarity transformation that enlarges or reduces a figure proportionally with respect to a center point and a scale factor.
(p. 661) A(n) ____________ is a pattern of one or more figures that covers a plane so that there are no overlapping or empty spaces.
(p. 682) The principle of _____________ states that two figures are congruent if and only if there is a rigid motion or a series of rigid motions that maps one figure exactly onto the other.
(p. 651) When a transformation is applied to a figure and then another transformation is applied to its image, the result is called a(n) ___________ of transformations.
(p. 674) To find the ___________ of an image after a dilation centered at the origin, multiply the x- and y-___________ of each point on the preimage by the scale factor of the dilation, k.
(p. 674) Dilations can also have ________ scale factors.
(p. 664) Aerodynamically designed to spin after it is thrown, a football's shape is that of a prolate ________. This means that one axis of symmetry is longer than its other axes.
Down
(p. 661) A(n) ____-regular tessellation is formed by two or more regular polygons.
(p. 663) The number of times a figure maps onto ______ as it rotates from 0° to 360° is called the order of symmetry.
(p. 673) If k > 1, then the dilation is a(n) ____________.
(p. 664) A three-dimensional figure has _____ symmetry if the figure can be mapped onto itself by a reflection in a _____.
(p. 663) A figure in the plane has __________ symmetry (or radial symmetry) if the figure can be mapped onto itself by a rotation between 0° and 360° about the center of the figure, called the center of symmetry (or point of symmetry).
(p. 662) A figure in the plane has ____________ symmetry (or line symmetry) if the figure can be mapped onto itself by a reflection in a line, called a line of symmetry (or axis of symmetry).
(p. 661) A(n) _______ tessellation is formed by only one type of regular polygon.
(p. 664) _____ - a polyhedron with two parallel congruent bases connected by parallelogram faces.
(p. 653) The composition of two reflections in ____________ lines is the same as a rotation.
(p. 652) Double ______ are used to indicate that vertex is the image of a second transformation.
(p. 673) If 0 < k < 1, then the dilation is a(n) __________.
(p. 673) A(n) ________ with center C and positive scale factor k, k ≠ 1, is a function that maps a point P in a figure to its image.
(p. 652) The composition of ___ reflections in parallel lines is the same as a translation.
(p. 662) A figure has ________ if there exists a rigid motion--reflection, translation, rotation, or glide reflection--that maps the figure onto itself.
(p. 652) Glide reflections, reflections, translations, and rotations are the only four _____ motions or isometries in a plane.
(p. 665) A three-dimensional figure has ____ symmetry if the figure can be mapped onto itself by a rotation between 0° and 360° in a line called the ____ of symmetry.