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b)-Kpersegi=4×sisi=4×40=160
-k stgh lngkrn=2.phi.r=2.22/7.14=88÷2=44
-k slurhny=Kp-Klingkrn=160-44=116
D= 14
r = 7
K = πd
K = × 14
K = 44 cm
b) K.lingkaran =
K yg diarsir = 2 p.busur + 4 ( 26 )
k yg diarsir = 2 × + 104
K.yg diarsir = 44 = 104 = 148 cm