Hitunglah keliling bangun berikut ini..

[tex]b.)keliling \: lingkaran \: = 2\pi \: r[/tex]


[tex] = 2 \times 3.14 \times 8[/tex]
[tex] = 16 \times 3.14[/tex]
[tex] = 50.24[/tex]



[tex]d.)keliling \: lingkaran \: = 2\pi \: r[/tex]
[tex] = 2 \times \frac{22}{7} \times 28[/tex]
[tex] = 176[/tex]




semoga membantu
maaf kalau salah

B)
r = 8 m
K = ....???

K = (3/4 × 2 × phi × r) + (2 × r)
K = (3/2 × 3,14 × 8) + (2 × 8)
K = 37,68 + 16
K = 53,68 m

C)
d = 56 cm
K = .....????

K = 2 × phi × d
K = 2 × 22/7 × 56
K = 352 cm