Studied by 9 people
Angle of Rotation
a measurement of the amount, the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle
Center of Rotation
a fixed point around which shapes move in a circular motion to a new position
Center of Dilation
the fixed point about which the figure is enlarged or reduced
Center of Symmetry
the center of rotation in a figure that has rotational symmetry
Composition of transformations
a combination of two or more transformations
Congruence transformations (rigid motions)
if you slide, flip, or turn a triangle, the size and shape do not change
Dilation
a transformation that changes the size of an object, but not the shape.
Glide reflection
the composition of a translation and a reflection across a line parallel to the translation vector
Image
the new position of a point, a line, a line segment, or a figure after a transformation
Pre-image
the original figure in a transformation
Line of Reflection
a line that a figure is flipped across to create a mirror image of the original figure
Note 
Flashcard (22)