berapakah jari jari dan diameter lingkaran apabila diketahui keliling 10 cm ?

[tex]k = \pi \times d \\ 10 = \frac{22}{7} \times d \\ d = 10 \times \frac{7}{22} \\ d = 3.18 \\ r = \frac{d}{2} = \frac{3.18}{2} = 1.59[/tex]
maaf kalo salah