Area of Circles & Sectors.

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Presentation transcript:

Area of Circles & Sectors

2 Types of Answers Exact Rounded Pi will be in your answer Do NOT write Pi in your answer Exact Pi will be in your answer

The amount of space occupied. Area The amount of space occupied. r A= pr2

Find the EXACT area. r = 29 feet d = 44 miles

Ex 3 & 4. Find the area. Round to the nearest tenths. 53 cm 7.6 yd

Sector the region bounded by two radii of the circle and their intercepted arc.

Area of a Sector

Find the area of the sector to the nearest hundredths. Example 1 Find the area of the sector to the nearest hundredths. R 6 cm 60  Q A  18.85 cm2

Find the exact area of the sector. Example 2 Find the exact area of the sector. 6 cm 120 7 cm Q R 

Working Backwards

Ex 3 Find the radius of the circle if the area of the circle is 225 cm2.

Ex 4 Find the radius. Round to the nearest hundredth.  100◦

Ex 5 Find the radius. Round to the nearest hundredth. 80◦ 

Classwork Back of this Worksheet