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# double block algebra

### NGC DB algebra voc review

Two numbers with something in common: can be compared and written as a fraction ratio
to enlarge or shrink something dilation
to make a shape or object larger or smaller by multiplying it by a number scale factor
a shape or object that has the same proportions, but may be a different size similar figure
a five sided, two-dimensional figure pentagon
a four sided, two-dimensional figure with four right angles rectangle
to create a new shape by reflecting an image across a line: a mirror image reflection
to move a shape a certain amount on a coordinate plane translation
(x,y)----(x+4,y-3) translation
(x,y) ----(3x,3y) dilation
(x,y) ----(x,-y) reflection over the x axis
(x,y) ---(-x,y) reflection over the y axis
figures with the same size and shape. congruent
a relationship between two ratios with the a constant rate or ratio. proportion
formula for scale factor new/old
horizontal axis x axis
vertical axis y axis
Created by: garlandg