6.5: The Circumference/Diameter Ratio

[Pages:19]6.5: The Circumference/Diameter Ratio

Circumference: Distance around a circle.

. .

= = .

All circles are similar

What is a radian?

, ?

Full circle in radians C = 2 ?

degrees

=

?

radians

=

?

Your Turn: , ? degrees = (?180)/ = 108?

degrees = (?180)/ = 15?

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