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2 . 22/7 . 3,5 + 4 . 3,5
=36 cm
2) 2 . 22/7 . r + 8r
2 . 22/7 . 7 + 8 . 7
44 + 56
= 100 cm
3) 2 . 3,14 . r + 6r
2 . 3,14 . 3,8 + 6 . 3,8
23,864 + 22,8
= 46, 664 cm
4) 2 . 3,14 . r + 12r
2 . 3,14 . 5 + 12 . 5
31,4 + 60
= 91,4 cm
5) 2 . 3,14 . 20 + 12 . 20
125,6 + 240
=365,6 cm
6) 2 . 3,14 . 30 + 24 . 30
188,4 + 720
= 908,4 cm