1) whatangle an arc 22 cm in length subtends at the center of a circle of radius 21 cm? Central angle = 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 cm. //Please do not write pie for 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 =