Keliling =
Luas =
2) jari jari = 7 cm
Keliling =
Luas =
3 ) diameter = 80 cm
Keliling =
Luas =
4) jari jari = 15 cm
Keliling =
Luas =
5 ) diameter = 90 cm
Keliling =
Luas =
1) Diameter = 56 cm
1) kll=2×phi×r=2×22/7×28=1232÷7=176
L =phi×r*2=22/7×28×28=17248÷7=2464
2) kll=2×phi×r=2×22/7×7=308÷7=44
L=phi×r*2=22/7×7×7=1078÷7=154
3) kll=2×phi×r=2×3,14×40=125.6
L=phi×r*2=3,14×20×20=1256