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Undefined Terms in Geometry

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maikoanicoy

The document defines the three undefined terms in geometry - point, line, and plane. It explains that a point has no dimensions, a line has one dimension and infinite length, and a plane has two dimensions and infinite length and width. It provides examples of how these terms relate to real-life objects, such as stars being points, a pencil being a line, and a table top being a plane. The document concludes by assigning the reader to draw three real-life objects exemplifying the three terms on a sheet of paper.

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Undefined Terms in Geometry
Undefined Terms in Geometry
Undefined Terms Words that do not require formal definition. In Geometry, there are three undefined terms.
Undefined Terms Point Line Plane
Point A point has no dimension or actual size. Thus, it has no length, no width and no height (thickness).
Point A point is usually named with a capital letter. A B C D
Point We can associate point to our real-life. Example: Stars at night Point of a pen
Line A line has infinite length, no width and no height and it extends to one dimension only.
Line A line is named by a single lowercase script letter, or by any two (or more) points which lie on the line. l A B AB
Line Line can also be exhibited to real-life situation. Example: Body of a pencil Curtain Rod
Plane A plane has two dimension and it extends indefinitely in all directions. It has infinite length, infinite width and zero height.
Plane A plane is named by a single letter (plane m) or by three coplanar points, but not non- collinear point. m x y z Plane m Plane XYZ
Plane We can also identify plane to real-life object. Example: Top of a table Book Cover
assignment In a one whole sheet of a yellow paper, draw three real ¨Clife objects which exhibit the three undefined terms in Geometry.
END

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Undefined Terms in Geometry