A allude shows location and also has no size or dimension. A allude is represented by a dot and is usually named with a letter of choice. In the graphic below, the points are labelled through a nearby letter.

Line:A heat is a set of clues extends in two opposite directions there is no end. A line is one-dimensional and also has no width. The is figured out by naming 2 points on the line or by writing a small letter letter of selection after the line.

The notation, because that example, ab (written v a line symbol end the letters), is review as "line AB" and also refers come the heat that has points A and also B.

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A aircraft is a flat surface that has no thickness and extends without ending in all directions. That is a two-dimensional object. A plane is represented by a parallelogram and may be called by writing an uppercase letter of choice in one of its corners. I will go into detail about what a parallelogram is in future lessons. Because that now, think that a parallel as a "window pane."For simplicity, you could want come think the a aircraft as one infinitely huge sheet that paper.

The diagram below shows 3 points, a line, and a plane.

Line Segment:A heat line segment is component of a line having actually two points, called endpoints. It also has points between the endpoints. A heat segment go not have actually a set of constant points favor a heat does. Endpoint means that a line has a beginning and an end. The notation for a line segment in a bar over any letter that choice. Say abdominal muscle has a bar end it, friend would review it together "line segment AB."

Ray:A ray is component of a line having actually one endpoint and a set of every points ~ above one side of the endpoint. A ray is constantly named by using two letters the choice. The an initial letter should be the endpoint. We draw an arrow with one endpoint end the letters.

Angle:An edge is the union of 2 rays having the very same endpoint. The endpoint of an edge is dubbed the vertex; the beam are dubbed the political parties of the angle.

There space a few additional state in geometry that must be taken as well. They define relationships in between geometric objects:

**Collinear Points:** points the lie on the exact same line.

**Coplanar Points:** points the lie in the exact same plane.

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**Opposite Rays:** 2 rays the lie top top the same line, with a typical endpoint and also no other points in common. The opposite rays kind a directly line and/or a right angle that equals 180º.