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Mon 11/11. Solve for all variables shown: Boot-Up 11.11.13 / 6 min.

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Presentation on theme: "Mon 11/11. Solve for all variables shown: Boot-Up 11.11.13 / 6 min."— Presentation transcript:

1 Mon 11/11

2 Solve for all variables shown: Boot-Up 11.11.13 / 6 min.

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8 3. MAKING CONNECTIONS 1. TRIG RATIOS 2.

9 Tue 11/12

10 In the figure at right, line m is parallel to line n, and line t is a transversal crossing both m & n. Which of the following lists has 3 angles that are all equal in measure? A. ∠ a, ∠ b, ∠ d B. ∠ a, ∠ c, ∠ d C. ∠ a, ∠ c, ∠ e D. ∠ b, ∠ c, ∠ d E. ∠ b, ∠ c, ∠ e © 2004 ACT, Inc. All rights reserved.

11 Wed 11/13

12 As shown in the figure at right, Δ ABC is isosceles with the length of AB equal to the length of AC. The measure of ∠ A is 40° and points B, C, and D are collinear.* What is the measure of ∠ ACD ? A. 70° B. 80° C. 110° D. 140° E. 160° * All in a straight line. © 2004 ACT, Inc. All rights reserved. Boot-Up 11.13.13 / 6 min.

13 Find Lesson 8.1.1 8.1.1  8-1  8-2  8-3  8-4  8-5

14 In this chapter, you will learn:  About special types of Polygons, such as Regular & non ‑ Convex polygons.  How the measures of the interior and exterior angles of a Regular Polygon are related to the number of sides of the polygon.  How the areas of similar figures are related.  How to find the area and circumference of a circle and parts of circles and use this ability to solve problems in various contexts. See p.476 1)TTW: H/O spoons

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16 TSW: Read p.473 Intro paragraph.

17 Today’sObjective: * SWBAT = S tudent W ill B e A ble T o 8.1.1: SWBAT answer the following ?s: 1)How can I use the # of sides of a Regular Polygon to find the measure of the central  ? 2)What type of  is needed to form a Regular Polygon? 3)What is a Convex Polygon?

18 If you understand that any problem, no matter how big or complicated, and no matter the subject area – whether academic or real-life – can be broken down into smaller parts that you can handle, then that problem can be solved. OK, but what’s in it for me? TSW: Read 8-1 1 st paragraph.

19 A B C 26 24 10 20 12 23.32 30 12 32.31 120u 2 180u 2

20 8-1

21 8-1a 1) Can you determine the measure of any of these  s? 2) What kind of shape is being formed in the center? 3) How many degrees are there in a circle? 4) Which of these would you call the central  s of the pinwheel?

22 8-1b 1) What is this polygon called? 8-1b 8-1c TSW close textbook. TTW call & response

23 8-2 8-1c TSW close textbook. TTW call & response Rules for Pinwheels: 1)Corresponding  s must be in corresponding positions. 2)Vertices must meet in center. 3)  s must be adjacent to each other. (No gaps, no overlaps.)

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25 8-3 Central  #  s Used Pinwheel or Polygon? Name of Shape Measure of Central  s 1) 1 2) 2 3) 3

26 Angle 1: 3  s Angle 2: 9  s Angle 3: 18  s Pinwheels & Polygons: 1-2-3 Angles

27 Pinwheels & Polygons: A-B-C Angles Angle C: 5  s Angle B: Not a Pinwheel! Angle A: 8  s

28 Angle D: Not a Pinwheel! Angle E: 12  s Pinwheels & Polygons: D-E-F Angles Angle F: Not a Pinwheel!

29 8-4a

30 Thu 11/14

31 What is the area of the shape below? Boot-Up 11.14.13 / 6 min. 10 5 8 2

32 What is the area of the shape below? Boot-Up 11.14.13 / 6 min. 10 5 8 2

33 Today’sObjective: * SWBAT = S tudent W ill B e A ble T o 8.1.1: SWBAT answer the following ?s: 1)How can I use the # of sides of a Regular Polygon to find the measure of the central  ? 2)What type of  is needed to form a Regular Polygon? 3)What is a Convex Polygon?

34 Find Problem 8-4c. 8.1.1  8-4c  8-5

35 ConvexNon-Convex Based on what you see, write a definition for a Convex Polygon. 8-4c

36 Based on what you see, write a definition for a Convex Polygon. 8-4c

37 Convex Polygon: The vertices of convex polygons “point outward,” while some of the vertices of non ‑ convex polygons “point inward.” 8-4c

38 Angle E: 12  s Pinwheels & Polygons Angle 1: 3  s

39 8-5 Which of the below  s can be used to build a Convex Polygon? TTW H/O Tracing Paper

40 To build a convex polygon, you must use  s that are: 1)Isosceles 2) Have a central  whose measurement is a factor (divides evenly into) 360 .

41 Find Lesson 8.1.2 8.1.1  8-13  8-14  8-16 TSW Read 8.1.2 Intro Para

42 Today’sObjective: * SWBAT = S tudent W ill B e A ble T o 8.1.2: SWBAT find the sum of the interior  s of a polygon & will be able to apply this skill to solve problems.

43 8-13 1)What is meant by “interior  ? 2)How many interior  s are there? 3)What does each interior  measure? 4)What is the sum of the  s? 5) Can you break this shape down into shapes whose  sum you know?

44 8-13 1)What is the sum of the  s in a  ? 2)How many  s are there? 3)What is the sum of all the  s of all 3  s ?

45 8-13 1)What is meant by “interior  ? 2)How many interior  s are there? 3)What does each interior  measure? 4)What is the sum of the  s?

46 8-13 1)What does each central  measure? 2)What kind of  s are these? 3)If the central  measures ___, & these are ____  s, then what do the remaining  s in the  measure? 72 ? ?

47 8-13 1)How many interior  s are there? 2)What does each interior  measure? 3)What is the sum of the  s?

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51 # of Triangles Canst thou determine the formula to save us from the interminable torment of these infernal calculations ere the terrors of Ragnarok o’ertake us all?

52 Verily, ‘tis: Well done, my Midgardian friends! Now to celebrate with a Frosty Flagon of Frost-Dragon’s Mead… ( n -2)180

53 8-14b.

54 8-14c. Ah! But that ‘tis but the merest of child’s play for a true algbebraic warrior (or geometric giant)! To prove thy mettle, canst thou find the sum of the interior angles of a 100 ‑ gon? Explain your reasoning.

55 Fri 11/15

56 The shape shown below is a Regular Heptagon. What is: 1) The measure of the sum of all its interior  s? 2) The measure of each of its interior  s? Boot-Up 11.15.13 / 6 min. a a a a a a a

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58 Today’sObjective: * SWBAT = S tudent W ill B e A ble T o 8.1.3: SWBAT: 1)Determine the measure of an interior & exterior  of a Regular Polygon.

59 Find Lesson 8.1.3 8.1.3  8-24  8-36 a,b,d  8-25  8-37  8-26  8-38  8-27

60 8-24 a, b

61 Formula to find measure of each Interior  of a Regular Polygon, where n = # sides of polygon.

62 8-25 If it’s a square, then it has 4 equal sides. If it has 4 equal sides, then it’s a square.

63 8-25 If it’s a square, then it has 4 right angles. If it has 4 right angles, then it’s a square.

64 8-26a

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68 A B C 26 24 10 20 12 23.32 30 12 32.31 Rectangle = 30 x 24 = 720 120u 2 180u 2

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70 y x I IVIII II

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