Unit 9 Flashcards
The ratio of the length of one side of a polygon with the length of a corresponding side of a similar polygon is called the _____ ratio.
similarity
Similar polygons are polygons whose corresponding _____ are congruent and whose corresponding sides are proportional.
angles
A dilation is a noncongruent transformation in which the _____, but not the shape of a geometric figure is changed.
size
A proportion is an equation that states that two ratios are _____.
equal
The first and last terms of a proportion are called the _____.
extremes
A _____ reflection is the composition of transformations that results when a translation is followed by a reflection across a line parallel to the translation vector.
glide
A translation is a congruent transformation along a vector such that each segment joining a point and its _____ has the same length as the vector and is parallel to the vector.
image
Angle of _____ symmetry is the smallest angle through which a preimage can be rotated to coincide with its image.
rotational
A ____ is a repeating pattern that completely covers a plane with no gaps or overlaps.
tessellation
_____ of rotational symmetry is the number of times an image can coincide with its preimage as it rotates through 360°.
Order
