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L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. . DO NOW . Directions: Estimate the degree of the angle Estimation:_________ Estimation:__________ Estimation:_________ Estimation:__________.

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  1. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. DO NOW Directions: Estimate the degree of the angle Estimation:_________ Estimation:__________ Estimation:_________ Estimation:__________

  2. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. Estimating Degrees 360° 270° A full circle _______ A ¾ of a circle ________ A ½ a circle is ________ A ¼ of a circle is _______ 180° 90°

  3. Full Circle = 90o x 4 = 360o 90o 90o 90o 135o 180o 210o 0o / 360o 90o 90o 270o

  4. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. TRY AGAIN Directions: Estimate the degree of the angle Estimation:_________ Estimation:__________ Estimation:_________ Estimation:__________ 150° 30° 90° 250°

  5. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. USING A PROTRACTOR

  6. The protractor's origin is at the vertex of an angle.

  7. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. The Vertex

  8. The protractor's base line is along the arm.

  9. Make sure that you are using the appropriate scale when reading the angle. For example, the angle below is 50° and not 130°:

  10. 130o

  11. FIND THE EXACT DEGREE Directions: Find the exact the degree of the angle Exact:_________ Exact:__________ Exact:_________ Exact:__________ 135o 30o 90o ?

  12. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. ?

  13. 180o ? ?

  14. 180o + 40o = 220o 180o ? 40o ?

  15. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. ? We know a full circle is 360o ?

  16. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. 360o – 140o = 220o 140o

  17. FIND THE EXACT DEGREE Directions: Find the exact the degree of the angle Exact:_________ Exact:__________ Exact:_________ Exact:__________ 135o 30o 90o 220o

  18. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. Converting Percentages to Degrees • Step 1: Take the percentage • Ex. 75% • Step 2: Divide the percentage by 100 • 75 / 100 = .75 • Step 3: Multiply the decimial by 360 (360 degrees in a full circle – a full circle is 100%) • .75 x 360 = 270 degrees

  19. L.T.: I can use a protractor to create pie charts of molecular formulas and determine the angle of molecular bonds. YOUR TASK: Complete the worksheet. ****Use the protractor to create the pie chart

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