Area of a sector is given by

A circle sector/ sector of a circle is defined as the region of a circle enclosed by an arc and two radii.

The smaller area is called the minor sector and the larger area is called the major sector.

Figures | Area | Perimeter | |

Circle | or | or | r : radius d : diameter |

Semicircle | |||

Quadrant | |||

Ring | (Outer circumference ) (Inner circumference) | R : Radius of bigger circle r : Radius of smaller circle | |

Sector | (i) (ii) | r : Radius of circle l : length of arc | |

Segment | : angle subtended by arc at centre |

**Example**

If a pizza is cut in such a way that it divides into 8 equal parts as shown in the figure, then what is the area of each piece of the pizza? The radius of the circle shaped pizza is 7 cm.

**Solution**

Area of piece of area of circle

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