Rachel
About
Khan Academy on a Stick
Area of a sector given a central angle
Circle arcs and sectors
Language and notation of the circle
Circles: radius, diameter, circumference and Pi
Length of an arc that subtends a central angle
Finding central angle measure given arc length
Area of a sector given a central angle
Your browser does not support Flash or HTML5 video. You can:
upgrade your browser
install Flash
try this direct link
If the above player doesn't work,
try this direct link
.