Geometry Vocabulary

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Conjecture

Back

An unproven statement that is based on observations.

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Inductive Reasoning

Back

Looking for patterns and making conjectures.

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Counterexample

Back

An example that shows a conjecture is false.

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Definition

Back

Uses known words to describe a new word.

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Undefined Terms

Back

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Point

Back

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

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Line

Back

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

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Plane

Back

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

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Collinear Points

Back

Points that lie on the same line.

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Coplanar Points

Back

Points that lie on the same plane.