Jawaban:
No. 1
Jari-Jari :
[tex]jari-jari = r = 7cm[/tex]
Diameter :
[tex]diameter = 2 × r = 14cm[/tex]
Luas 1/2 Lingkaran :
[tex]luas \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times \pi \times {r}^{2} \\ luas \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times \frac{22}{7} \times {7}^{2} \\ luas \: \frac{1}{2} \: lingkaran = 77 {cm}^{2} [/tex]
Keliling 1/2 Lingkaran :
[tex]kll \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times 2 \times \pi \times r \\ kll \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times 2 \times \frac{22}{7} \times 7 \\ kll \: \frac{1}{2} \: lingkaran = 22cm[/tex]
No. 2
Jari-Jari
[tex]jari-jari = r = 28cm[/tex]
Diameter:
[tex]diameter = 2 × r = 56cm[/tex]
Luas Lingkaran :
[tex]Luas \: Lingkaran = \pi \times {r}^{2} \\ Luas \: Lingkaran = \frac{22}{7} \times {28}^{2} \\ Luas Lingkaran = 2426{cm}^{2} [/tex]
Keliling Lingkaran :
[tex]Kll \: Lingkaran = 2 \times \pi \times r \\ Kll \: Lingkaran = 2 \times \frac{22}{7} \times 28 \\ Kll \: Lingkaran = 176cm[/tex]
No. 3
[tex]jari-jari = r = 21cm[/tex]
[tex]diameter = 2 × r = 42cm[/tex]
[tex]Luas \: Lingkaran = \pi \times {r}^{2} \\ Luas \: Lingkaran = \frac{22}{7} \times {21}^{2} \\ Luas Lingkaran = 1386{cm}^{2} [/tex]
[tex]Kll \: Lingkaran = 2 \times \pi \times r \\ Kll \: Lingkaran = 2 \times \frac{22}{7} \times 21 \\ Kll \: Lingkaran = 132cm[/tex]
No. 4
[tex]jari-jari = r = 20cm[/tex]
[tex]diameter = 2 × r = 40cm[/tex]
Luas 1/4 Lingkaran :
[tex]Luas \: \frac{1}{4} \: Lingkaran = \frac{1}{4} \times \pi \times {r}^{2} \\ Luas \: \frac{1}{4} \: Lingkaran = \frac{1}{4} \times 3,14 \times {20}^{2} \\ Luas \: \frac{1}{4} \: Lingkaran = 3,14 \times 100 \\ Luas \: \frac{1}{4} \: Lingkaran = 314{cm}^{2}[/tex]
Keliling 1/4 Lingkaran :
[tex]Kll \: Lingkaran = \frac{1}{4} \times 2 \times \pi \times r \\ Kll \: Lingkaran = \frac{1}{4} \times 2 \times 3,14 \times 20 \\ Kll \: Lingkaran = 31,4cm[/tex]
No. 5
[tex]jari-jari = r = 35cm[/tex]
[tex]diameter = 2 × r = 70cm[/tex]
Luas 3/4 Lingkaran :
[tex]Luas \: \frac{3}{4} \: Lingkaran = \frac{3}{4} \times \pi \times {r}^{2} \\ Luas \: \frac{3}{4} \: Lingkaran = \frac{3}{4} \times \frac{22}{7} \times {35}^{2} \\ Luas \: \frac{3}{4} \: Lingkaran = \frac{5775}{2} \\ Luas \: \frac{3}{4} \: Lingkaran = 2887,5{cm}^{2}[/tex]
Keliling 3/4 Lingkaran :
[tex]Kll \: Lingkaran = \frac{3}{4} \times 2 \times \pi \times r \\ Kll \: Lingkaran = \frac{3}{4} \times 2 \times \frac{22}{7} \times 35 \\ Kll \: Lingkaran = 165cm[/tex]
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Jawaban:
No. 1
Jari-Jari :
[tex]jari-jari = r = 7cm[/tex]
Diameter :
[tex]diameter = 2 × r = 14cm[/tex]
Luas 1/2 Lingkaran :
[tex]luas \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times \pi \times {r}^{2} \\ luas \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times \frac{22}{7} \times {7}^{2} \\ luas \: \frac{1}{2} \: lingkaran = 77 {cm}^{2} [/tex]
Keliling 1/2 Lingkaran :
[tex]kll \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times 2 \times \pi \times r \\ kll \: \frac{1}{2} \: lingkaran = \frac{1}{2} \times 2 \times \frac{22}{7} \times 7 \\ kll \: \frac{1}{2} \: lingkaran = 22cm[/tex]
No. 2
Jari-Jari
[tex]jari-jari = r = 28cm[/tex]
Diameter:
[tex]diameter = 2 × r = 56cm[/tex]
Luas Lingkaran :
[tex]Luas \: Lingkaran = \pi \times {r}^{2} \\ Luas \: Lingkaran = \frac{22}{7} \times {28}^{2} \\ Luas Lingkaran = 2426{cm}^{2} [/tex]
Keliling Lingkaran :
[tex]Kll \: Lingkaran = 2 \times \pi \times r \\ Kll \: Lingkaran = 2 \times \frac{22}{7} \times 28 \\ Kll \: Lingkaran = 176cm[/tex]
No. 3
Jari-Jari
[tex]jari-jari = r = 21cm[/tex]
Diameter:
[tex]diameter = 2 × r = 42cm[/tex]
Luas Lingkaran :
[tex]Luas \: Lingkaran = \pi \times {r}^{2} \\ Luas \: Lingkaran = \frac{22}{7} \times {21}^{2} \\ Luas Lingkaran = 1386{cm}^{2} [/tex]
Keliling Lingkaran :
[tex]Kll \: Lingkaran = 2 \times \pi \times r \\ Kll \: Lingkaran = 2 \times \frac{22}{7} \times 21 \\ Kll \: Lingkaran = 132cm[/tex]
No. 4
Jari-Jari
[tex]jari-jari = r = 20cm[/tex]
Diameter:
[tex]diameter = 2 × r = 40cm[/tex]
Luas 1/4 Lingkaran :
[tex]Luas \: \frac{1}{4} \: Lingkaran = \frac{1}{4} \times \pi \times {r}^{2} \\ Luas \: \frac{1}{4} \: Lingkaran = \frac{1}{4} \times 3,14 \times {20}^{2} \\ Luas \: \frac{1}{4} \: Lingkaran = 3,14 \times 100 \\ Luas \: \frac{1}{4} \: Lingkaran = 314{cm}^{2}[/tex]
Keliling 1/4 Lingkaran :
[tex]Kll \: Lingkaran = \frac{1}{4} \times 2 \times \pi \times r \\ Kll \: Lingkaran = \frac{1}{4} \times 2 \times 3,14 \times 20 \\ Kll \: Lingkaran = 31,4cm[/tex]
No. 5
Jari-Jari
[tex]jari-jari = r = 35cm[/tex]
Diameter:
[tex]diameter = 2 × r = 70cm[/tex]
Luas 3/4 Lingkaran :
[tex]Luas \: \frac{3}{4} \: Lingkaran = \frac{3}{4} \times \pi \times {r}^{2} \\ Luas \: \frac{3}{4} \: Lingkaran = \frac{3}{4} \times \frac{22}{7} \times {35}^{2} \\ Luas \: \frac{3}{4} \: Lingkaran = \frac{5775}{2} \\ Luas \: \frac{3}{4} \: Lingkaran = 2887,5{cm}^{2}[/tex]
Keliling 3/4 Lingkaran :
[tex]Kll \: Lingkaran = \frac{3}{4} \times 2 \times \pi \times r \\ Kll \: Lingkaran = \frac{3}{4} \times 2 \times \frac{22}{7} \times 35 \\ Kll \: Lingkaran = 165cm[/tex]
Semoga membantu :D
Jangan Lupa Jadikan Jawaban Terbaik yaa
Wanwan selalu membantumu :^
#MATEMATIKAMENYENANGKAN