Jawabanmu

2014-02-23T22:16:42+07:00
1 keliling lingkaan = 2.pi.r 352 = 2 . 22/7. r r = 56 luas lingkaran = pi . r pangkat 2 = 22/7 × 56 pangkat 2 = 9856 2 keliling lingkaran × bnyak putaran = 2.pi.r.4 = 2.22/7.30.4 =754 cm
2014-02-23T23:06:09+07:00
Kliling lingkrn X bnyk putrn 2xphixr X bnyk putrn 2x3,14x30 X 4 188, 4 X 4 753, 6 cm