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Math Vocab Practice
vector
a quantity that has both direction and magnitude, and is represented in the coordinate plane by an arrow drawn from one point to another
translation
a transformation that moves every point of a figure the same distance in the same direction
vertical component
the vertical change from the starting point of a vector to the ending point
transformation
a function that moves or changes a figure in some way to produce a new figure
terminal point
the ending point of a vector
similarity transformation
a dilation or a composition of rigid motions and dilations
similar figures
geometric figures that can be mapped to one another by a similarity transformation
center of rotation
the fixed point in a rotation
center of symmetry
the center of rotation in a figure that has rotational symmetry
angle of rotation
the angle that is formed by rays drawn from the center of rotation to a point and its image
center of dilation
the fixed point in a dilation
component form
a form of a vector that combines the horizontal and vertical components
composition of transformations
the combination of two or more transformations to form a single transformation
congruence transformation
also known as rigid motion, it is a transformation that preserves length and angle measure
congruent figures
geometric figures that can be mapped to one another by a rigid motion or a composition of rigid motion
reduction
a dilation in which the scale factor is greater that 0 and less than 1
line of symmetry
a line of reflection that maps a figure onto itself
rigid motion
transformation that preserves length and angle measure
rotational symmetry
a figure has rotational symmetry when the figure can be mapped onto itself by a rotation of 180o or less about the center of the figure
preimage
the original figure before a transformation
reflection
a transformation that uses a line like a mirror to reflect a figure
rotation
a transformation in which a figure is turned about a fixed point
scale factor
the ratio of the lengths of the corresponding sides of the image and the preimage of a dilation
initial point
the starting point of a vector
image
a figure that results from the transformation of a geometric figure
line symmetry
a figure in the plane has line symmetry when the figure can be mapped onto itself by a reflection in a line
line of reflection
a line that acts as a mirror for a reflection
horizontal component
the horizontal change from the starting point of a vector to the ending point
glide reflection
a transformation involving a translation followed by a reflection
enlargement
a dilation in which the scale factor is greater than 1
dilation
a transformation in which a figure is enlarged or reduced with respect to a fixed point
