BASIC GEOMETRY CONCEPTS AND DEFINITIONS

Geometry: It is an area of knowledge which studies any elements and operations on/in the plane such as points, lines or shapes. It comes from the Greek geo "earh", metry"measurement".

Point: In geometry a point can be defined as the place or location where two lines intersect. A point has no dimensions, no height and no width.

Line: A one-dimensional object formed of infinite points. It has no end points and continues on forever on a plane.

Ray: A line which begins at a particular point (called the endpoint) and extends endlessly in one direction.

End point: An End Point is a point at which a line segment or a ray ends or strarts.

Midpoint: It is the point that is halfway between the endpoints of the line segment.

Line segment: It is a line with two endpoints

Straight line: A line whose points follow the same direction.

Plane: It is a two-dimensional (height and width) surface. In the space a plane can be defined by two paralel lines, two intersecting lines or one point an a straight line.

Lenght: Measurement of something from end to end.