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Geometry

Geometry. 1.2 Points, Lines and Planes. 1.2 Basic Vocabulary. Point has no size , but is represented by a dot . P all geometric figures consist of points. Line extends in 2 directions without ending has length, but no width or thickness

hyacinth-robertson
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Geometry

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  1. Geometry 1.2 Points, Lines and Planes

  2. 1.2 Basic Vocabulary • Point has no size , but is represented by a dot.P all geometric figures consist of points

  3. Line extends in 2 directions without ending has length, but no width or thickness (like a point, the picture is symbolic) Line d

  4. Plane extends in all directions without ending like a floor or a wall has length and width, but no thickness (like a point and line, the picture is symbolic) Plane K K

  5. In Geometry, the terms point, line and plane are • accepted as intuitive ideas • not defined • used in definitions of other terms

  6. Some More Definitions • Space the set of all points • Collinear points points all in one line • Noncollinear points points not in one line

  7. Still More • Coplanar points points all in one plane • Noncoplanar points points not all in one plane

  8. More about lines • The intersection of two lines is a ______________? Point

  9. More about planes • The intersection of two planes is a ______________? Line

  10. More about planes • The intersection of a plane and a line not on that plane is a ______________? Point

  11. Check for understanding • Turn to page 7 in your textbook • Examine the figures on the right side of the page • Let’s do Classroom Exercises (CE) #1-20 together (you have seen some of these before) Roll the dice!

  12. Homework 1B • P. 7 WE # 1-33 odd P. 10 #40-46 Even Look at Section 1.3 P. 14 #1-24 (4X) (1,4,8, etc…)

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