1 / 14

1-3 Measuring Segments

1-3 Measuring Segments. Chapter 1 The Tools of Geometry. Last class we worked on new vocabulary and 3 postulates. You may use Your notes from class Your Lesson Closure Book …to complete the assignment 1-2 Practice. We will check this assignment in 30 minutes and turn it in.

yamka
Télécharger la présentation

1-3 Measuring Segments

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. 1-3 Measuring Segments Chapter 1 The Tools of Geometry

  2. Last class we worked on new vocabulary and 3 postulates • You may use • Your notes from class • Your Lesson Closure Book …to complete the assignment 1-2 Practice. • We will check this assignment in 30 minutes and turn it in.

  3. Today’s Lesson: Measuring Segments The Burbot fish are found in Europe, Asia, and North America (the Great Lakes). Adult Burbots grow to be between 30 and 60 cm. This shows a young fish. How would you determine its length to the nearest centimeter? Use this scale

  4. Postulate 1-5 Ruler Postulate • The real number that corresponds to a point on a number line is the coordinate of the point.

  5. Find the measure of each segment. • What is DF? Use the Ruler Postulate • What is AD? • What is BD? • What is BF?

  6. Postulate 1-6 Segment Addition Postulate • If three points, A, P, and B are collinear and P is between A and B, then AP + PB = AB.

  7. 3x + 8 2x + 4 L M N • If LN = 32, what are LM and MN?

  8. 4x + 6 7x + 15 J K L You try this one • If JL = 120, what are JK and KL?

  9. Comparing Segment Lengths • When numerical expressions have the same value, we say they are equal. 3 + 7 = 4 + 6 • If two segments have the same length, we say they are congruent segments. Symbol: ≅

  10. Comparing Segment Lengths Are AC and DF congruent? Are AC and CD congruent?

  11. Comparing Segment Lengths Point C is equidistant from both A and D. Therefore it is the midpoint of AD. Midpoint: a point that divides a segment into two congruent segments.

  12. Any point, line, or ray that intersects a segment at its midpoint is said to bisect the segment. • That point, line, ray, or segment is called a segment bisector.

  13. We can use the midpoint to find solutions to problems. T S R • S is the midpoint of RT. • What are RS and ST? • What is RT? 7x – 3 3x + 1

  14. On page 3 in your composition book, complete the following:

More Related