Geometry Chapter 1 Vocab

Front

Angle > 0° and < 90°

Back

acute angle

Front

Angle between 90° and 180°

Back

Obtuse angle

Front

Angle measuring 180°

Back

Straight angle

Front

Movement preserving shape and size

Back

Rigid transformation

Front

Figure formed by two rays or segments at a common endpoint

Back

angle

Front

One-dimensional object extending infinitely in two directions, made of points, with no thickness.

Back

line

Front

Portion of a line between two points

Back

line segment

Front

Point where x- and y-axes intersect

Back

origin

Front

Location in space

Back

Point

Front

Part of a line extending infinitely in one direction.

Back

ray