1 / 11

Geometry Notes

Geometry Notes. Section 1-2. What you’ll learn. How to define postulate How to identify and model line segments How to apply the Segment Addition Postulate How to compute with measures How to identify congruent segments. Vocabulary Terms:. Postulate Line segment Betweeness of points

oprah-patterson
Download Presentation

Geometry Notes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Geometry Notes Section 1-2

  2. What you’ll learn • How to define postulate • How to identify and model line segments • How to apply the Segment Addition Postulate • How to compute with measures • How to identify congruent segments

  3. Vocabulary Terms: • Postulate • Line segment • Betweeness of points • Between • Segment Addition Postulate • Unit Conversion • Congruent Segments

  4. Postulates • Geometry is based on accepted rules and proven theories. • Postulate is the term used for rules that are assumed to be true (postulates do not have to be proven).

  5. Line Segment—a section of a line from one endpoint to another endpoint P • Draw it with 2 dots (one at each end) and a straight line between them Q • Name it by the endpts (with above) • Fact: Segments are measureable. They have a beginning and end. The measure of a segment is written by naming the endpts with capital printed letters (PQ means the measure of PQ) • Words/Symbols: • PQ

  6. Segments have measure • Segments are measured with a ruler, yardstick or tape measure • Units of measure include • Inches • Feet • Yards • Centimeters • Meters

  7. Unit Conversion Standard • Students will be able to convert units of measurement within and between systems • Within the same system • Like inches to feet • Between systems • Like inches to centimeters

  8. Betweeness • There are infinitely many points between the endpoints of a line segment G O • For Example • Given DG D • Would it be fair to say O is between D and G? • What relationships do you see between the points? • Do the points have to be collinear? • Is there some connection between the measures DO, OG and DG?

  9. Betweeness and the Segment Addition Postulate • O is between D and G if and only if G O D • D, O , and G are collinear • DO + OG = DG

  10. B C A D Congruent Segments • Congruent figures have the same size and shape • Since all segments have the same shape we only need to verify that two segments have the same measure to be congruent • Definition of Congruent Segments: • Two segments are congruent if and only if they have the same measure. • Using symbols: AB  CD iff AB = CD

  11. Have you learned. . . • How to define postulate? • How to identify and model line segments? • How to apply the Segment Addition Postulate? • How to compute with measures? • How to identify congruent segments? • Your assignment is Worksheet 1.2

More Related