Geometry Vocabulary (Sem 1)

Front

What is a ray?

Back

A part of a line that is straight, has 1 endpoint, and continues in 1 direction.

Front

Segments that have the same length are called ______________________________.

Back

congruent segments.

Front

A _______________ is a flat, 2-dimensional surface usually represented by a shape that looks like a floor or a wall.

Back

plane.

Front

Name the figure: Segment CD, Segment DC, Ray DC, Line CD.

Back

Line CD.

Front

Points that lie in the same plane are called _____________________.

Back

coplanar points.

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What are collinear points?

Back

Points that lie on the same straight line.

Front

What is a midpoint?

Back

The point that divides a segment into two equal parts.

Front

What is an angle?

Back

A figure formed by two rays with a common endpoint called the vertex.

Front

What is a polygon?

Back

A closed figure formed by a finite number of line segments.