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7.1 Angles & Triangles

7.1 Angles & Triangles. Angles. Positive Angle. Negative Angle. Counterclockwise rotation. Clockwise rotation. . . Degrees. 1  = 60 = 3600. Seconds. Degrees. Minutes. 1 Revolution = 360 . Complementary & Supplementary Angles. Complementary :.

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7.1 Angles & Triangles

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  1. 7.1 Angles & Triangles

  2. Angles Positive Angle Negative Angle Counterclockwise rotation Clockwise rotation  

  3. Degrees 1 = 60 = 3600 Seconds Degrees Minutes 1 Revolution = 360

  4. Complementary & Supplementary Angles Complementary: The sum of 2 positive angles = 90 Supplementary: The sum of 2 positive angles = 180

  5. Ex 1) Find the A that is complementary to  B = 272014 Complementary: A + B = 90 Rewrite 90 as 895960 895960 272014 62 A = 39 46

  6. Ex 2) Find the A that is supplementary to  B = 874916 Supplementary: A + B = 180 Rewrite 180 as 1795960 1795960 874916 92 A = 10 44

  7. Ex 3) Change 23.24 into degree-minute-second format. 23.24 = 23 + 0.24 1 = 60 = 23 + 0.24(60) = 23 + 14.4 = 23 + 14 + 0.4 1 = 60 = 23 + 14 + 0.4(60) = 231424

  8. Ex 4) Change 1432715 into decimal-degree format.

  9. Homework #701 Pg. 385 1 – 39 odd

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