Sector of a CircleSection 11.5

Sector – portion of the area of a circle

area of sector = arc measure area of circle 360

Definitions & Formulas

Find the area of the red sector below.

Sectors

Find the area of the blue sector below.

Sectors

Given the area of the red sector below, what is the area of circle V?

Area

Find the EXACT area of a circle with a diameter of 6 ft.

What is the area of the sector with a central angle of 120o?

Area

2A r

p. 758: 3-31(odds)

Practice Problems