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15 Cards in this Set
- Front
- Back
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Define a conjecture.
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A conjecture is an unproven statement that is based on observation.
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Inductive reasoning is what?
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Looking for patterns and making conjectures is part of a process called inductive reasoning.
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What is a counterexample?
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A counterexample is an example that shows a conjecture is false.
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An undefined term is what?
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An undefined term: You can't define them without using other figures.
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What are the undefined terms?
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The undefined terms are point, line and plane.
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What is a point?
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A point names a location and has no size. It is represented by a dot.
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What is a line?
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A line is a straight path that has no thickness and extends forever.
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What is a ray?
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A ray is a part of a line that starts at an endpoint and extends forever in one direction.
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What is a segment?
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A segment is two points and all the points in between them.
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What is a plane?
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A plane is a flat surface that has no thickness and extends forever.
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What does the word collinear mean?
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Points that lie on the same line are collinear.
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What does the word coplanar mean?
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Points that lie on the same plane are coplanar.
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Points that lie on the same line are, besides collinear, what?
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Coplanar.
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What are opposite rays?
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Opposite rays are two rays that have a common endpoint and form a line.
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What is a postulate? (axiom)
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A statement that is accepted as true without proof.
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