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The Unit Circle

The Unit Circle. Part I MSpencer. r = 1. r = 1. r = 1. r = 1. The Unit Circle. It is called a unit circle because the radius is one unit. r = 1. All the Way Around. One way to measure angles is with degrees . One revolution around the unit circle constitutes 360°.

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The Unit Circle

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  1. The Unit Circle Part I MSpencer

  2. r = 1 r = 1 r = 1 r = 1 The Unit Circle It is called a unit circle because the radius is one unit.

  3. r = 1 All the Way Around One way to measure angles is with degrees. One revolution around the unit circle constitutes 360°. Another way of measuring angles is with radians. Since a revolution is the circumference of a circle and r = 1, C = 2r = 2(1) = 2  2 radians is equivalent to 360°

  4. r = 1 One Revolution 0°, 0 360°, 2

  5. 90°, 270°, Multiples of 90°, 180°,  360°, 2 0°, 0

  6. 90°, QII 90° <  < 180° <  <  Q I 0° <  < 90° 0 <  < QIV 270° <  < 360° <  < 2 QIII 180° <  < 270°  <  < 270°, The Quadrants 180°,  360°, 2 0°, 0

  7. 135°, 45°, 225°, 315°, Multiples of 45°,

  8. 120°, 60°, 240°, 300°, Multiples of 60°,

  9. 150°, 30°, 210°, 330°, Multiples of 30°,

  10. 90°, 150°, 120°, 30°, 60°, 135°, 45°, 225°, 315°, 240°, 210°, 330°, 300°, 270°, The Whole Unit Circle Together (Grouped) 180°,  360°, 2 0°, 0

  11. 90°, 150°, 120°, 30°, 60°, 135°, 45°, 225°, 315°, 240°, 210°, 330°, 300°, 270°, The Whole Unit Circle Together (In Ascending Order) 180°,  360°, 2 0°, 0

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