Plis bantu jawab nanti ku folow deh plis bantu jawab
Jawaban:
1.
Jari jari: 14cm
Diameter: 14cm x 2 = 28cm
Luas: πr² = 22/7 x 14² = 22/7 x 196 = 616cm²
2.
Jari jari: 40cm ÷ 2 = 20cm
Diameter: 40cm
luas: πr² = 3,14 x 20² = 3,14 x 400 = 1.256cm²
3.
Jari jari: 63 ÷ 2 = 31,5cm
Diameter: 63cm
Luas: πr² = 22/7 x 31,5² = 22/7 x 992,25 = 3.118,5cm²
4.
Jari jari:
L = 706,5cm²
L = πr²
r² = L ÷ π
r² = 706,5 ÷ 3,14
r² = √2.218,14
r² = 47,097133670744
Diameter: 94,194267341489
Luas: 706,5cm²
no.4 gk tau bener ato gk aiwk :v