1 / 5

Warm Up

Explore the validity of geometry postulates with explanations and examples. Learn how to determine the truth or falsity of statements based on definitions and previous knowledge. Includes exercises and solutions.

yin
Download Presentation

Warm Up

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. Week 6 Warm Up 09.22.11 1) State the postulate that shows the statement to be false: A line contains at least three points.

  2. Definitions Previous knowledge used to explain your answers. Ex 1 Is the statement true or false: • A Explain. • • X B D D,X, and B are collinear. • C Answer True. 2 or more points are collinear if they lie on the same line. D,X, and B all lie on DB so they are collinear.

  3. Do 1: True or False: ∠ AXB is adjacent to ∠ CXD • A 1st Sentence: True or False 2nd Sentence: Definition 3rd Sentence: Describe why definition proves the graph • • X B D • Answer False. By definition adjacent angles must share a common side. ∠ AXB and ∠ CXD do not share a common side so they are not adjacent. C

  4. Biconditional Statement A statement that contains the phrase “if and only if”. It is a conditional statement and its converse. Ex 3 Three lines are coplanar if and only if theylie in the same plane. Conditional Statement: if three lines are coplanar, then they lie in the same plane. Converse: if three lines lie in the same plane then they are coplanar.

  5. • A Do: 2 ∠ AXB is vertical to ∠ BXC • • X B D • C Assignment: Textbook Page 82, 13 – 23 All and 59 – 68 All.

More Related