5. The concept…
Can you find the arc length of this
Semicircle?
What would the arc length be if we just wanted to use a
quarter of the circle?
6. HOW DO WE FIND ARC LENGHTS?
With the following proportion:
Part of a circumference
Whole Circumference
circle
Arc length
пD
=
Portion of degrees
Whole: Degrees in a
= Central Angle
360