Geometry Vocabulary Flashcards

Vocabulary flashcards covering fundamental geometric terms, transformations, and angle definitions from the lecture notes.

Point

An exact location in space; has no dimension

Parallel Lines

Lines that do not intersect and lie in the same plane

Reflection

Transformation that produces a mirror image

Skew Lines

Lines that do not intersect and are not on the same plane

Translation

Transformation in which every point in a figure is moved in the same direction and by the same distance

Plane

A flat surface that extends endlessly in all directions

Right Angle

An angle that measures $90$ degrees

Partition

To separate or divide

Rotation

Transformation of a figure by turning it about an axis or center point

Straight Angle

An angle that measures $180$ degrees

Isometry

Transformation that preserves distance and angle measure

Line Segment

Part of a line having two endpoints

Line

A collection of points along a straight path that extends endlessly in both directions

Dilation

Proportional increase or decrease in size in all directions

Scale Factor

Constant that is multiplied by the length of a figure to produce a new image that is the same shape as original image

Congruent

Exactly the same shape and size

Perpendicular Lines

Lines that intersect at a $90$ degree angle

Acute Angle

An angle that measures less than $90$ degrees

Obtuse Angle

An angle that measures more than $90$ degrees

Vertical Angles

The opposite angles formed when two lines intersect

Bisect

To cut or divide something into two equal parts

Similar

Having exactly the same shape but not necessarily the same size

Rigid Transformation

A transformation of points in space consisting of a sequence of one or more translations, reflections, or rotations; It preserves distances and angle measures