Basic Geometry-points and lines

Points-

A point has no length, width, or height - it just specifies an exact location. It is zero-dimensional. In geometry we usually identify this point with a number or letter. For example, the picture above shoes a point labeled "A". A point is a position in a space. Two points are always coplanar and colinear, meaning on the same line. Just think about drawing a dot on a piece of paper anywhere and naming it with a number or letter or other identification. Points make up lines.

Lines

A line is one of the basic terms in geometry. We may think of a line as a "straight" line that we might draw with a ruler on a piece of paper, except that in geometry, a line extends forever in both directions. We write the name of a line passing through two different points A and B as "line AB" or as , the two-headed arrow over AB signifying a line passing through points A and B. Some types of lines are perpendicular lines, parallel lines, and contour lines . Lines make up planes and all kinds of shapes used in our everyday lives.