Chapter 1 Exploring Geometry

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Presentation transcript:

Chapter 1 Exploring Geometry

1.2 Points, Lines, and Planes

Drill Find the next number in the sequence: -3, -1, 1, 3, __, __ 1, 4, 2, 5, 0, __, __ Name three things in the real world that represent a line, a point and an angle.

Notes(Vocab) Points: have no size, often represented with dots, and named with a capital letter. C A B

Lines: have no thickness, and extend infinitely in two directions Lines: have no thickness, and extend infinitely in two directions. Named with two points, or a cursive letter. l Y X

Collinear: points that are lying in the same line. Non-Collinear: Not lying in the same line. A B C C A B

Planes: Extend infinitely in all directions Planes: Extend infinitely in all directions. It is flat and has no thickness. There are two ways to name a plane. Coplanar: Points and lines that are in the same Plane.

Postulates: an accepted statement or fact. *The intersection of two lines is a ______. *The intersection of two planes is a ______. *Through any two points lies exactly one ______. *Through any three non-collinear points there is exactly one ______. point line line plane

A C B I D E H F G

Homework Page #’s 15 – 16 #’s 1 – 26 # 39