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b. K = 2 x 22/7 x 10,5 = 66 cm
2.) a. K = 2 x 3,14 x 2,8 = 17,584 cm
b. K = 2 x 3,14 x 4,2 = 26,376 cm
3.) a. K = 22/7 x 2,8 = 8,8 cm
b. K = 22/7 x 35 = 110 m
b.66 cm
3.a 17.6cm
b.220cm