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Home / Geometry / The point and the lines| Basic Geometry

# The point and the lines| Basic Geometry

Point: A point has no length, breadth and thickness i.e., it has no magnitude. It has position only. It is regarded as an entity of zero dimensions. A point is always named with capital letters.

## Line: A line has only length and no breadth or thickness. It is regarded as an entity of one dimension.

Straight line: A straight line is the shortest distance between two given points.

Curve line: A curved line is nowhere straight. There are endless varieties of curved lines.

Horizontal line: A horizontal line is perfectly level.

Vertical line: A vertical line is perfectly upright, like a plumb line.

Oblique line: An oblique line is neither horizontal nor vertical.

Parallel lines: Parallel lines are lines in the same direction. They cannot meet however far they may be produced.

Ray: A ray is a portion of a line that begins at some point. A ray has one end point.

Line segment: A line segment is a portion of a line. A line segment has two end points.

## If two triangles have the three sides of the one equal to the three sides of the other, each to each, then they are equal in all respects.

If two triangles have the three sides of the one equal to the three sides ...