A circle has a radius of 12.6 cm.
2 answers:
Circle circumference = 12.6 cm * 2 * PI Circle circumference = 25.2 cm * PI a 120 degree arc would be (1/3) of the circumference 120 degree arc = (25.2 / 3) cm * PI 120 degree arc = 8.4 PI centimeters
Answer:
Length of an arc is given by:
where,
r is the radius of the circle
is the angle in radian.
As per the statement:
A circle has a radius of 12.6 cm.
⇒r = 12.6 cm
It is also given that: a central angle measuring 120°.
Use conversion:
1 degree =
then;
120 degree =
⇒
then;
Substitute the given values we have;
cm
therefore, the exact length of an arc is, cm
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