1
Q
area
A
pi*r squared
2
Q
sector area (degrees)
A
theta/360pir squared
3
Q
sector area (radians)
A
1/2r squaredtheta
4
Q
circumference
A
2pir
5
Q
arc length (degrees)
A
theta/3602pi*r
6
Q
arc length
A
r*theta
