Jawaban
2. 4.658,5 cm²
3. 50 cm
4. 17 cm
5. 220 cm
PENJELASAN
2. Luas Lingkaran= π×r×r
π = 22/7
r = 38,5
L = 22/7×38,5×38,5
L = 4.658,5 cm²
3. Keliling Lingkaran= π×d
K = π×d
157 = 3,14×d
157÷3,14 = d
D = 50 cm
4. Luas Lingkaran= π×r×r
L = π×r×r
907,46 = 3,14 × r²
r² = 907,46÷3,14
r² = 289
[tex] r= \sqrt{289 } \\ r = 17[/tex]
5. Mencari Diameter Lingkaran
3.850 = 22/7×r²
r² = 3.850÷22/7
r² = 3.850×7/22
r² = 1.225
[tex]r = \sqrt{1225} \\ r = 35 \\ d = 35 \times 2 \\ d = 70[/tex]
Mencari Keliling Lingkaran
K = 22/7×70
K = 220
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Verified answer
Jawaban
2. 4.658,5 cm²
3. 50 cm
4. 17 cm
5. 220 cm
PENJELASAN
2. Luas Lingkaran= π×r×r
π = 22/7
r = 38,5
L = 22/7×38,5×38,5
L = 4.658,5 cm²
3. Keliling Lingkaran= π×d
K = π×d
157 = 3,14×d
157÷3,14 = d
D = 50 cm
4. Luas Lingkaran= π×r×r
L = π×r×r
907,46 = 3,14 × r²
r² = 907,46÷3,14
r² = 289
[tex] r= \sqrt{289 } \\ r = 17[/tex]
5. Mencari Diameter Lingkaran
L = π×r×r
3.850 = 22/7×r²
r² = 3.850÷22/7
r² = 3.850×7/22
r² = 1.225
[tex]r = \sqrt{1225} \\ r = 35 \\ d = 35 \times 2 \\ d = 70[/tex]
Mencari Keliling Lingkaran
K = π×d
K = 22/7×70
K = 220