Geometry unit 1 vocabulary

point

A Dot

Line

A straight path that extends without end in opposite directions

Line segment

part of a line with two endpoints

Ray

A part of a line, with one endpoint, that continues without end in one direction

angle

A figure formed by two rays with a common endpoint

Congruent

Equal or the same size

Plane

A slanted four sided figure that extends in all directions infinitely

Co-linear

Points on the same line.

Intersect

To cross

Parallel

Lines that stay the same distance apart and never intersect.

Perpendicular

Intersecting at or forming right angles (90 degrees)

Midpoint

A point that divides a segment into two congruent segments (two parts that are the same size)

Bisect

To divide into two equal or congruent parts