Geometry Terms Notes

What is the definition of a Point in geometry?

• A flat surface that extends without end.

• A line that extends infinitely in both directions.

• A location in space with no size, represented by a dot.

• A three-dimensional object with length, width, and height.

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What is the definition of a Line in geometry?

• A straight path that extends infinitely in both directions.

• A closed figure with three sides.

• A curve that does not cross itself.

• A point with no dimension.

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What is the definition of a Plane in geometry?

• A point with no dimensions.

• A line segment with two endpoints.

• A solid figure with volume.

• A flat surface that extends infinitely in all directions.

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What is the definition of a Line Segment in geometry?

• A line that extends infinitely in both directions.

• A part of a line with two endpoints.

• A shape with three sides.

• A point with no length or width.

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What is the definition of a Ray in geometry?

• A part of a line that starts at one point and extends infinitely in one direction.

• A line segment with two endpoints.

• A closed figure with three or more sides.

• A point that has no length, width, or thickness.

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What is the definition of an Angle in geometry?

• A closed figure with three or more sides.

• A straight line extending in both directions.

• A figure formed by two rays with a common endpoint.

• A point where two lines meet but do not form rays.

What is the definition of Parallel Lines in geometry?

• Lines in a plane that never intersect and are always the same distance apart.

• Lines that cross each other at right angles.

• Lines that meet at a single point.

• Lines that curve and change direction.

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What is the definition of Perpendicular Lines in geometry?

• Lines that intersect at any angle except 90 degrees.

• Lines that never meet and are always the same distance apart.

• Lines that curve and never intersect.

• Lines that intersect at a right angle (90 degrees).

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Points- Named using: ________________________________

• A small letter

• A number

• A capital letter

• A symbol

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Planes- Named using: __________________ or __________________ Ex: Name the plane in two different ways. (Diagram with points A, B, C, and L)

• A single point or a script lowercase letter. Example: Plane A or plane l.

• Two collinear points or a lowercase letter. Example: Plane AB or plane l.

• Any two points or a number. Example: Plane 12 or Plane AB.

• Three non-collinear points or a script capital letter. Example: Plane ABC or Plane L.

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