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3/9 Geometry Bell Ringer

3/9 Geometry Bell Ringer. Homework: Due FRIDAY!!!! Pg. 37 (#1 – 7) Pg. 504 (#1 – 6) Pg. 492 (#1 – 6) Bonus (7-9). 30 °. 14 m. In the following 30-60-90 triangle, solve for b and c. b. 60 °. a. 3/9 News and Notes. Perfection: None Missing Quizzes: 1 st : Brian

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3/9 Geometry Bell Ringer

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  1. 3/9 Geometry Bell Ringer Homework: Due FRIDAY!!!! Pg. 37 (#1 – 7) Pg. 504 (#1 – 6) Pg. 492 (#1 – 6) Bonus (7-9) 30° 14 m In the following 30-60-90 triangle, solve for b and c. b 60° a

  2. 3/9 News and Notes • Perfection: None • Missing Quizzes: • 1st: Brian • 7th: Kaneisha, Niesha, Leslie • 8th: Desirae, Diego, Jasmine Z • HW Due Friday again. • Unit Test next Tuesday!

  3. Today’s Goal • Use the Pythagorean Theorem to discover the Distance Formula

  4. What’s the distance between the points (2,3) and (5,7)? • Step 1: Plot Points • Step 2: Create a right ∆ • What are the coordinates Of the 3rd point?  (5, 3) • Step 3: What are the lengths of the legs?  3 and 4. C 4 3

  5. Continued… • Step 4: Use Pythagorean Theorem 32 + 42 = c2 9 + 16 = c2 25 = c2 C = 5

  6. Now the Distance Formula… • Start with Pythag. Thm: 32 + 42 = c2 Where do 3 and 4 come from? Where do these #s come from?

  7. So the distance between two points is…

  8. One Example…Write your answer really BIG on a sheet of paper, but don’t show it until Mr. C says so. • Use the method of your choice (Pythagorean Theorem or Distance Formula) to answer this question. • Point P has coordinates (1,3). Point Q has coordinates (7, 11). How long is segment PQ?

  9. Missed it? Try this one before you jump to the Indep. Practice. • What’s the distance from the station to the fire?

  10. Exit Ticket • What’s the distance between (2,4) and (4,6). Simplify your answer!

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