# Shared Flashcard Set

## Details

Transformations unit
Basic transformations: translations, reflections, dilations, similar & congruent figures
19
Mathematics
03/21/2011

Term
 Congruent polygons
Definition
 Polygons that have congruent corresponding angles & congruent corresponding sides.
Term
 Find the measure of angle s: [image]
Definition
 124
Term
 Similar Polygons
Definition
 The corresponding angles are equal.   The corresponding side lengths are proportional.
Term
 A Translation
Definition
 Is a transformation that moves each point of a figure the same distance in the same direction.
Term
 Slide to the right a units
Definition
 x  → x+a
Term
 Slide up b units
Definition
 y → y+b
Term
 Slide to the left a units
Definition
 x   → x-a
Term
 Slide down b units
Definition
 y → y-b
Term
 Reflections in the x-axis
Definition
 (x, y) → (x,-y)
Term
 Reflections in the y-axis
Definition
 (x,y)  → (-x,y)
Term
 Dilations
Definition
 P(x,y)  → P´(kx,ky)    Where k is the scale factor
Term
 Congruent Polygons
Definition
 Polygons that have corresponding angles and corresponding sides that are congruent.
Term
 Corresponding Parts
Definition
 Are in the same position in different figures
Term
 Transformation
Definition
 is an operation that changes a figure into another figure
Term
 Translation
Definition
 is a transformation that moves each point of a figure the same distance in the same direction
Term
 Reflection
Definition
 A transformation that creates a mirror image of each point of a figure
Term
 Line of reflection
Definition
 when you reflect a figure in a line the line is the line of reflection
Term
 Line symmetry
Definition
 if one half of the figure is a mirror image of the ther half, then the figure has line symmetry
Term
 Dilation
Definition
 a transformation that stretches or shrinks a figure
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