circle Flashcards
Circle are
1
Q
Area of circle
A
Pi r^2
2
Q
Area of semicircle
A
1/2Pi r^2
3
Q
Area of quadrant
A
1/4 Pi r^2
4
Q
Area of segment (30-90)
A
Pi r^2theta/360-1/2r^2Sintheta
5
Q
Area of sector
A
Pir^2theta/360
6
Q
Are of segment(120)
A
Pi r^2 theta/360- r^2sin theta/2 × cost theta /2
7
Q
Perimeter of a semicircle
A
Pi r + 2r
7
Q
Circumference
A
2Pi r
8
Q
Perimeter of a quadrant
A
1/4 2Pir+2r
9
Q
Perimeter of a sector
A
2Pir theta/360
10
Q
L
A
