1.diketahui keliling lingkaran nya 44cm.berpa jari-jarinya,berapa diameternya,berapa luasnya??
2.diketahui keliling lingkaran 18,84cm,berapa jari-jarinya,berapa diameternya,berapa luasnya??
2.diketahui keliling lingkaran 18,84cm,berapa jari-jarinya,berapa diameternya,berapa luasnya??
efaayuratnaningk
1. K= 44cm K lingkaran = 2πr 44 cm = 2πr 44/2 = πr 22 = 22/7 x r 22 x 7/22 = r 7 = r , jari jari = 7cm Diameter = 2r = 2x7 = 14cm Luas = πr² L= 22/7 x 7x7 L = 22x 7 = 154 cm²
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efaayuratnaningk
K = 18,84 cm , r? d? L?
efaayuratnaningk
K= 2πr ,,,,, 18,84 = 2 x 3,14 x r ,,,, 18,84/2 = 3,14 x r ,,,, 9,42 = 3,14 x r ,,,, 9,42/3,14 = r ,,,, 3 cm = r (jari jari) ,,,, d = 2r = 2x3= 6cm ,,,, L = πr² ,,,, L = 3,14 x 3² ,,,, L = 3,14x 9 = 28,26 cm²
peterraider
1. K= 44cm K lingkaran = 2πr 44 cm = 2πr 44/2 = πr 22 = 22/7 x r 22 x 7/22 = r 7 = r , jari jari = 7cm Diameter = 2r = 2x7 = 14cm Luas = πr² L= 22/7 x 7x7 L = 22x 7 = 154 cm²
1 votes
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