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Basic Geometry Concepts

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Basic Geometry Concepts Empty Basic Geometry Concepts

Post by Admin Dale on Fri Jun 18, 2010 7:20 pm

Basic Geometry Concepts


---We may think of a point as a "dot" on a piece of paper or the pinpoint on a board. In geometry we usually identify this point with a number or letter. A point has no length, width, or height - it just specifies an exact location. It is zero-dimensional.

The following is a diagram of points A, B, and M:

Basic Geometry Concepts Basic-geometry-points-1


---A line is one-dimensional. That is, a line has length, but no width or height. In geometry, a line extends forever in both directions. A line is uniquely determined by two points.

Basic Geometry Concepts Basic-geometry-line-1

The line passing through the points A and B
is denoted by line AB


---A line segment connects two endpoints. A line segment with two endpoints A and B is denoted by line segment AB .

Basic Geometry Concepts Basic-geometry-linesegment-1

A line segment can also be drawn as part of a line.

Basic Geometry Concepts Basic-geometry-linesegment-2


----The midpoint of a segment divides the segment into two segments of equal length. The diagram below shows the midpoint M of the line segment AB . Since M is the midpoint, we know that the lengths AM = MB.

Basic Geometry Concepts Basic-geometry-midpoint-1


---A ray starts from one endpoint and extends forever in one direction.

Basic Geometry Concepts Basic-geometry-ray-1

A ray starting from point A and passing through B
is denoted by ray AB


---Planes are two-dimensional. A plane has length and width, but no height, and extends infinitely on all sides. Planes are thought of as flat surfaces, like a tabletop. A plane is made up of an infinite amount of lines. Two-dimensional figures are called plane figures.

Basic Geometry Concepts Basic-geometry-plane-1

A plane

Here is a video:

Admin Dale
Admin Dale

Full Name : Dale Villanueva Bartolome
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  • Former Isabelan

Posts : 45
Join date : 2010-04-21
Age : 23
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