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kemungkinnan
karena dibagi 4 sudut jumlahkan saja semua suddut yang diketahui
2x+3x+4x+3x = 180°
12x = 180
x = 180 : 12
x = 15°
sudut terkecilnya = 2x
masukkan saja x nya
2x = 2(15) = 30°