a. K = πd = 22/7.28 = 22.4 = 88 cm
L = πr² = 22/7.14² = 22.2.14 = 616 cm²
b. K = πd = 3,14.40 = 125,6 cm
L = πr² = 3,14.20² = 314.4 = 1.256 cm²
a. πr² = 50,24
r² = 16
r = 4
b. πr² = 826 cm²
r = 16,219042... cm
a. πr² = 440 cm²
r² = 440 × 7/22
r² = 20 × 7
r = 2√35 cm
b. πr² = 616 cm²
r² = 616 × 7/22
r² = 28 × 7
r² = √[ 2² × 7² ]
r = 14 cm
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Soal Nomor 1
a. K = πd = 22/7.28 = 22.4 = 88 cm
L = πr² = 22/7.14² = 22.2.14 = 616 cm²
b. K = πd = 3,14.40 = 125,6 cm
L = πr² = 3,14.20² = 314.4 = 1.256 cm²
Soal Nomor 2
a. πr² = 50,24
r² = 16
r = 4
b. πr² = 826 cm²
r = 16,219042... cm
Soal Nomor 3
a. πr² = 440 cm²
r² = 440 × 7/22
r² = 20 × 7
r = 2√35 cm
b. πr² = 616 cm²
r² = 616 × 7/22
r² = 28 × 7
r² = √[ 2² × 7² ]
r = 14 cm
Semoga bermanfaat