Question 1042817
1) what dose an arc 22cm in length subtends at the center of a circle of radius 21cm .
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2) an arc subtends an angle of 120 degree at the center of a circle of radius 42cm. Find the length of the arc if pie is 22 over 7. 
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No math problems with pie, unless it's a pie chart.
Use the Greek letter pi.
And, pi is not 22/7.
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3) calculate the area of a sector of a circle which subtends an angle of 45 degree at the center of the circle of radius 14 cm.