Lesson 1 Objectives:

1. Understanding the undefined terms: point, line, plane.

You are watching: Definition of non coplanar in geometry

2. Knowledge the identified terms: collinear, coplanar, and also intersection.

2. Illustration representations that points, lines and planes.

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The simplest figure in geometry is described as a **point**. That does not have actually a certain size and is regularly represent through a dot and labeled making use of capitol letters. Points room in all geometric figures and also we define room to be the collection of every points. Listed below are the points A and also B.

Another acquainted geometric figure is a **line**. A heat extends in two different directions through no end. A heat itself does no have any type of thickness and also is labeled using a lower instance letter. If you understand that 2 points room on the line you can likewise define it using those 2 points. Below is line l or

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A geometric **plane** is said by a floor or wall. That extends through no end or edges and has no thickness, yet when we draw a aircraft we normally attract it together a four-sided figure. Usually planes are labeled with capitol letters, as with points. Listed below is plane M:

**Collinear points** are points every in one line and also **non collinear** points room points that space not top top one line. Listed below points A, F and B room collinear and points G and also H room non collinear.

**Coplanar point out **are points every in one plane and **non coplanar points** room points that room not in the exact same plane. Listed below points B, C and E room coplanar, points D and A space coplanar but points E and D would not be coplanar.

The **intersection** the two numbers is the collection of all points that space in both figures. (The dashes in the diagrams suggest parts concealed from watch in numbers in space). Listed below are a few examples of intersections.

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