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What is the area of a sector with a central angle of 3π5 radians and a diameter of 21.2 cm?

 Use 3.14 for π and round your final answer to the nearest hundredth.

 

Enter your answer as a decimal in the box.

 

____ cm²

sii1lver  Mar 19, 2018
 #1
avatar+87656 
+2

Area  =   1/2 (diameter/2)^2* (theta in rads)  =

 

1/2 ( 21.2 / 2)^2 (3 *3.14 / 5 )  =

 

1/2 ( 10.6)^2  * (3 *3.14 / 5)  ≈   105.84 cm^2

 

 

cool cool cool

CPhill  Mar 19, 2018

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