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b. K = d = 3,14x16 = 50,24 cm
c. K = 2r = 2x3,14x10 =62,8 cm
d. K = 2r = 2x22/7x7 = 44 cm
maaf kalo salah..
Rumus = xd atau x r²
A.
3.14 x 24 = 75.36
B.
3.14 x16 = 50.24
C.
3.14x20 = 62.8
D.
22/7 x 14 = 44
NB = titik(.) adalah pengganti koma(,)