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Module 9 8th Math

Congruence and Similarity

TermDefinition
Angle Angle Similarity If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar
Composition of Transformations The resulting transformation when a transformation is applied to a figure and then another transformation is applied to its image
Congruent Having the same measure
Corresponding Parts Parts of congruent or similar figures that are in the same relative position
Indirect Measurements A technique using properties of similar polygons to find distances or lengths that are difficult to measure directly
Similar If one image can be obtained from another by a sequence of transformations and dilations
Image new image
Preimage original geometric figure
Transformation a change in a figure from its original state to a new state
Translation a slide of a figure from one position to another without turning it
Reflection a mirror image of a figure that has been flipped across a line
Line of reflection the line that a figure flips across
Center of rotation a fixed point
Rotation a turn about a fixed point
Clockwise to turn right
Counterclockwise to turn left
Dilation a change in which an image gets smaller or larger in size
Scale factor ratio of the side lengths of an image to the side lengths of the preimage
Enlargement to make bigger
Reduction to make smaller
Center of dilation the center point that a figure dilates about
Created by: tamarablyons
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