Sector of a Circle Section 11.5.  If a circle has a radius of 2 inches, then what is its circumference?  What is the length of the arc 172 o around.

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Presentation transcript:

Sector of a Circle Section 11.5

 If a circle has a radius of 2 inches, then what is its circumference?  What is the length of the arc 172 o around the circle? REVIEW

 Arc length – portion of the circumference of a circle  Sector – portion of the area of a circle Definitions & Formulas

 Find the area of the red sector below. Sectors

 Find the area of the blue sector below. Sectors

 Find the EXACT area of a circle with a radius of 4 ft.  What is the area of the sector with a central angle of 90 o ? 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 120 o ? Area

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

 Pg. 750 #11-13,  Pg. 758 #3-16 Assignment