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Why are there 360 degrees in a circle? Caught my eye

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Introduction to radians and converting to degrees and back again.

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Page 1: Pre-Cal 40S Slides February 4, 2008

Why are there 360 degrees in a circle?

Caught my eye

http://mathforum.org/library/drmath/sets/select/dm_circle360.html
http://flickr.com/photos/twmlabs/41482884/
Page 2: Pre-Cal 40S Slides February 4, 2008
Page 3: Pre-Cal 40S Slides February 4, 2008
Page 4: Pre-Cal 40S Slides February 4, 2008

Find the missing value, x, in each proportion ...

Page 5: Pre-Cal 40S Slides February 4, 2008

Find the missing value, x, in each proportion ...

Page 6: Pre-Cal 40S Slides February 4, 2008

Find the missing value, x, in each proportion ...

Page 7: Pre-Cal 40S Slides February 4, 2008

Convert 20° into radians.

Page 8: Pre-Cal 40S Slides February 4, 2008

D is an angle in degrees R is an angle in radians

CONVERTING DEGREES AND RADIANS


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