Geometry Vocabulary

Front

Conjecture

Back

An unproven statement that is based on observations.

Front

Inductive Reasoning

Back

Looking for patterns and making conjectures.

Front

Counterexample

Back

An example that shows a conjecture is false.

Front

Definition

Back

Uses known words to describe a new word.

Front

Undefined Terms

Back

Point, line, plane.

Front

Point

Back

Has no dimension, and is represented by a small dot.

Front

Line

Back

Extends in one dimension, represented by a straight line with arrowheads, and extends to infinity in both directions.

Front

Plane

Back

Extends in two dimensions, is represented by a parallelogram, and extends to infinity, even though it appears to have edges.

Front

Collinear Points

Back

Points that lie on the same line.

Front

Coplanar Points

Back

Points that lie on the same plane.