Question 1042817
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1) what {{{highlight(cross(dose))}}} angle an arc 22 cm in length subtends at the center of a circle of radius 21 cm?

    Central angle = {{{22/21}}} radians. 


2) an arc subtends an angle of 120 degree at the center of a circle of radius 42 cm. Find the length of the arc if pie is 22 over 7. 

    The length of the arc is {{{2pi*42/3}}} cm.   //Please do not write pie for pi ( {{{pi}}} ). 


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. 

    The area of the sector = {{{(pi*14^2)/8}}}
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