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Verified answer
<B+<C=<A40+30=70
<O= 2 x <A
<O=2 x 70=140 { d }
Verified answer
Kita Cari sudut kelilingnya dulusudut keliling=<A
<A=<B+<C (Mencari sudut kelilinh)
<A=40+30
<A=70 derajat
Sudut pusat(<O)=2×<a
Sudut pusat=2×Sudut keliling
Sudut Pusat(O)=2×70
Sudut Pusat(O)=140 derajat ( D )
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