dawsonwilliams dawsonwilliams

21-02-2017
Mathematics

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what part of the circumference is an arc whose measure is 30

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snakebitenate snakebitenate

21-02-2017

Circumference of a circle:
C = 2 r π;
Length of an arc:
L = r π α / 180°
L = r π · 30° / 180° = r π /6
r π /6 : 2 r π = 1/6 : 2 = 1/12

= 1/2

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