Unit 3 - Vocabulary

Front

Perpendicular Bisector

Back

A line, segment, or ray that intersects a line segment at its midpoint and forms a 90 degree angle.

Front

Rigid Motion

Back

A transformation that preserves the shape a size of a geometric figure.

Front

Composition of Rigid Motions

Back

A combination of two or more rigid motions, resulting in a single transformation.

Front

Glide Reflection

Back

A transformation involving a translation followed by a reflection across a line parallel to the direction of the translation.

Front

Point Symmetry

Back

occurs when a figure can be rotated 180 degrees around a central point, and the resulting image is congruent to the original

Front

Reflectional Symmetry

Back

occurs when a figure can be divided into two identical halves by a line (the line of symmetry) such that one half is a mirror image of the other

Front

Rotational Symmetry

Back

occurs when a shape looks the same after being rotated by some angle less than 360 degrees around a central point

Front

Image

Back

the new figure that results from applying a geometric transformation

Front

Preimage

Back

the original, unaltered figure

Front

Transformation

Back

a way to manipulate a shape or figure by changing its position, size, or orientation