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Keliling 2 x 22/7 x 7 = 44 cm
b. Luas 3,14 x 10 x 10 = 314 cm
Keliling 2 x 3,14 x 10 = 62,8 cm
: 2x 22/7 x 7
: 44 cm
Luas : r²
: 22/7 x 7 x 7
: 22 x 7 = 154 cm²
B. Keliling : D
: 3,14 x 20
: 62,8 cm
Luas : r²
: 3,14 x 10 x 10
: 3,14 x 100
: 314 cm²