lasardan2ceem0machke lasardan2ceem0machke

13-10-2016
Mathematics

contestada

What part of the circumference is an arc whose measure is 30°?
a.1/12
b.1/10
c.1/8
d.1/6

Respuesta :

HomertheGenius HomertheGenius

21-10-2016

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
Answer: A ) 1/12

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