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Measuring Angles

Measuring Angles. We measure angles with a protractor. http :// www.youtube.com/watch?v=lZc9hQJXBJw. Finding Angle Measures: What is measure of DOG. G. Center of protractor. Ray DO is at 0°. D. O. Line up angle vertex with center of protractor ; have one side at 0°.

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Measuring Angles

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  1. Measuring Angles We measure angles with a protractor.

  2. http:// www.youtube.com/watch?v=lZc9hQJXBJw

  3. Finding Angle Measures:What is measure of DOG G Center of protractor Ray DO is at 0° D O Line up angle vertex with center of protractor; have one side at 0°

  4. Look at where non-zeroed ray crosses…….. G D O Approximately 34°

  5. What is the angle measure? G D O Approximately 80°

  6. What is the angle measure? G D O Approximately 132°

  7. What is the angle measure? G D O Approximately 6°

  8. Drawing Angles 1. Draw a ray.

  9. Drawing Angles 2. Line up protractor with rays endpoint; have ray pointing to zero degrees.

  10. Drawing Angles 2. Put point at desired angle. Let’s make a 40° angle.

  11. Drawing Angles 3. Draw ray from endpoint of first ray though second point.

  12. Draw a 75 degree angle.

  13. Draw a 100 degree angle.

  14. Draw a 163 degree angle.

  15. Draw a 32 degree angle.

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