Question

If the circumference of the circle below is 64 cm, what is the length of xy , in centimeters? Do not include units in your answer.

Answer 1

so a circle is 360 degrees

45 degrees is 1/8th of the circle (45/360=1/8)

so to find the arc length, multiply the circumference, by the portion of the circle included

Answer 2

What do you mean by the portion of the circle included?

Answer 3

try and think about it this way:



similarly, the entire circumference relates to the entire 360 degrees, where as the length of xy would only relate to one eighth of the circles circumference