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Geometry - Act 9

Activity 9

TermDefinition
transformation change in size, shape, or position
pre-image original figure
function set of ordered pairs in which each x-value is associated with one and only one y-value
mapping pairing each member of the domain with each member of the range
translation rigid motion in which every point is moved the same distance and in the same direction
directed line segment distance and direction of a translation
rhombus parallelogram with 4 congruent sides
reflection a transformation in which a figure is flipped over a line
line of reflection the central line about which a figure produces its line of symmetry
line of symmetry an actual or imaginary line that creates a mirror image
rotation a transformation that maps points across a circular arc, preserves the distance of each point to the center of rotation
rotational symmetry a rotation of less than 360 degrees that can map the shape onto itself
angle of rotational symmetry smallest angle that can map a shape onto itself
composition of transformations two or more transformations performed in sequence
congruent figures a composition of rigid motions maps one figure to another
Created by: shoemaker