Question

tolong bantu jawab tiga² nya, dan jangan lupa pake cara​

Answer 1

No 1

[tex]k = 2 \times \pi \times r[/tex]

[tex]88 = 2 \times \frac{22}{7} \times r[/tex]

[tex]88 = \frac{44}{7} \times r[/tex]

[tex]88 \times \frac{7}{44} = r[/tex]

[tex]14 \: \: cm = r[/tex]

[tex] \\ [/tex]

[tex]l = \pi \times {r}^{2} [/tex]

[tex]l = \frac{22}{7} \times 14 \times 14[/tex]

[tex]l = 22 \times 2 \times 14[/tex]

[tex]l = \boxed{616 \: \: {cm}^{2} }[/tex]

[tex] \\ [/tex]

No 2

[tex]k = \pi \times d[/tex]

[tex]k = 3,14 \times 50[/tex]

[tex]k = 157 \: cm[/tex]

[tex] \\ [/tex]

[tex]jarak = keliling \times putaran[/tex]

[tex]j = 157 \times 60[/tex]

[tex]j = 9420 \: \: cm[/tex]

[tex]j = \boxed{94,2 \: \: m}[/tex]

[tex] \\ [/tex]

No 3

• Luas persegi

[tex]l = s \times s[/tex]

[tex]l = 14 \times 14[/tex]

[tex]l = 196 \: \: {cm}^{2} [/tex]

[tex] \\ [/tex]

• Luas lingkaran

[tex]l = \pi \times r \times r[/tex]

[tex]l = \frac{22}{7} \times 7 \times 7[/tex]

[tex]l = 22 \times 7[/tex]

[tex]l = 154 \: \: {cm}^{2} [/tex]

[tex] \\ [/tex]

• Luas yang diarsir

[tex]l = 196 - 154 [/tex]

[tex]l = \boxed{42 \: \: {cm}^{2} }[/tex]