A Wedge obtained by taking a portion of a Circle with Central Angle radians (180°),
illustrated above as the shaded region. A sector of radians would be a Semicircle. Let be the radius of
the Circle, the Chord length, the Arc Length, the height of the arced portion, and the
height of the triangular portion. Then

(1) | |||

(2) | |||

(3) | |||

(4) | |||

(5) | |||

(6) | |||

(7) | |||

(8) | |||

(9) |

The Angle obeys the relationships

(10) |

The Area of the sector is

(11) |

**References**

Beyer, W. H. (Ed.) *CRC Standard Mathematical Tables, 28th ed.* Boca Raton, FL: CRC Press, p. 125, 1987.

© 1996-9

1999-05-26