jurjes0506a jurjes0506a

06-12-2018
Mathematics

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a circle has a circumference of 20. it has an arc length of 4, what is the central angle of the arc, in degrees?

Respuesta :

ballyho126 ballyho126

06-12-2018

Answer:

let Φ be the central angle of the arc

pi*2r = 20

r = 10/pi

arc length= 2pi*r*(Φ/360°)

4 = 2pi*r*(Φ/360°)

Φ=2/10 * 360° =72° degree

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