# M217 Section 1.1 - PowerPoint PPT Presentation

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M217 Section 1.1. Points, Lines, and Planes (oh my!). Definitions. Definitions. Example 1. Name 3 collinear points Name 3 non-collinear points List two opposite rays Are and the same? List 3 coplanar points. Example 2. Name a point coplanar with J, K, L M, N, O

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M217 Section 1.1

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## M217 Section 1.1

Points, Lines, and Planes (oh my!)

### Example 1

• Name 3 collinear points

• Name 3 non-collinear points

• List two opposite rays

• Are and the same?

• List 3 coplanar points

### Example 2

• Name a point coplanar with

• J, K, L

• M, N, O

• J, Q

• Where do segments JQ and QN intersect?

• Where do planes JQN and MNO intersect?

### Point Line and Plane Postulates

• A postulate is a statement that is accepted without proof.

• Through any 2 pts there is exactly 1 line

• Through any 3 noncollinear pts there is exactly one plane containing them

• When two lines intersect, the intersection is a point

• When two planes intersect, the intersection is a line

### Drawing Planes

• Plane G containing two lines that intersect at point J

• Two planes that intersect at line SD