21-03-2017
Mathematics

contestada

A circle has a radius of 12.6 cm.

What is the exact length of an arc formed by a central angle measuring 120°?

Express your answer using π .

Respuesta :

wolf1728 wolf1728

21-03-2017

circumference = 2 * PI * radius
circumference = 2 * PI * 12.6
If the central angle is 120°, then the arc will be exactly one third of the circumference.
arc length = (2 * PI * 12.6) / 3
arc length = 8.4 PI

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