Jawaban:
K = phi × r²
3,4 × 5 × 5 = 85
K = 85cm²
jari jari 5 cm
diameter = 2kali jari jari
jadi 10cm diameternya
rumus keliling phi x d =
3,14 x 10 = 31,4cm
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Jawaban:
K = phi × r²
3,4 × 5 × 5 = 85
K = 85cm²
jari jari 5 cm
diameter = 2kali jari jari
jadi 10cm diameternya
rumus keliling phi x d =
3,14 x 10 = 31,4cm