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Bell Ringer on Lesson 1-1 - 6 questions In your notes, then do p. 11-12 53, 58, 61 and 63

Bell Ringer on Lesson 1-1 - 6 questions In your notes, then do p. 11-12 53, 58, 61 and 63. Watch Video - Describing What You see. Content Standards

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Bell Ringer on Lesson 1-1 - 6 questions In your notes, then do p. 11-12 53, 58, 61 and 63

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  1. Bell Ringer on Lesson 1-1 - 6 questions In your notes, then do p. 11-12 53, 58, 61 and 63

  2. Watch Video - Describing What You see.

  3. Content Standards G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc. G.CO.12 Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Mathematical Practices 6 Attend to precision. CCSS

  4. You identified and modeled points, lines, and planes. Measure segments using equations and calculate with measures with a 90% accuracy. Then/Now

  5. line segment • betweenness of points • between • congruent segments • construction Vocabulary

  6. B.Find the length of AB using the ruler. Answer:AB is about 4.5 centimeters long. Length in Metric Units Each centimeter is divided into fourths. Point B is closer to the 4.5 cm mark. Example 1

  7. B. Length in Standard Units Example 2

  8. A. A. B. C. D. Example 2a

  9. Concept

  10. ___ XZ is the measure of XZ. Point Y is between X and Z. XZ can be found by adding XY and YZ. Find Measurements by Adding Find XZ. Assume that the figure is not drawn to scale. Example 3

  11. Add. Find Measurements by Adding Example 3

  12. D 50.4 mm C 16.8 mm B Find BD. Assume that the figure is not drawn to scale. Example 3

  13. 3 minutes • Individual Practice p. 18 – 20 1, 2, 13, 15,

  14. Find Measurements by Subtracting Find LM. Assume that the figure is not drawn to scale. Point M is between L and N. LM + MN = LN Betweenness of points LM + 2.6 = 4 Substitution LM + 2.6 – 2.6 = 4 – 2.6 Subtract 2.6 from each side. LM = 1.4 Simplify. Example 4

  15. 3 in V in. A. B. C. D. U T in. in. in. Find TU. Assume that the figure is not drawn to scale. Example 4

  16. Draw a figure to represent this situation. Write and Solve Equations to Find Measurements ALGEBRA Find the value of x and ST if T is between S and U, ST = 7x, SU = 45, and TU = 5x – 3. ST + TU = SU Betweenness of points 7x + 5x – 3 = 45 Substitute known values. 7x + 5x – 3 + 3 = 45 + 3 Add 3 to each side. 12x = 48 Simplify. Example 5

  17. Write and Solve Equations to Find Measurements x = 4 Simplify. Now find ST. ST = 7xGiven = 7(4) x = 4 = 28 Multiply. Answer:x = 4, ST = 28 Example 5

  18. ALGEBRA Find the value of n and WX if W is between X and Y, WX = 6n – 10, XY = 17, and WY = 3n. Draw a diagram first. Example 5

  19. 5 minutes • Individual Practice page 18 – 20 Do 21, 23, 25

  20. Equal vs. Congruent See p. 16 in the margin Lengths are equal and segments are congruent Concept

  21. Class Assignment – in notes (8 minutes) • p. 18 - 21 9, 35, 42, 43 • HW p. 18 – 21 10 – 16 even 22- 28, 33, 46, 48

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