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jumlah perbandingan = 2 + 3 + 4 = 9
jumlah ketiga sudut segitiga harus 180 derajat,
maka sudut terkecil = 2/9 x 180 = 40
perbndingan sudut : 2 : 3 : 4
jumlah sudut segitiga = 180
fktor pengli = x
maka :
180 = sudut (1+2+3)
180 = 2x + 3x + 4x
180 = 9x
x = 180/9
x = 20
jadi besar masing2 sudut :
sudut 1 = 2 x 20 = 40 (sudut terkecil)
sudut 2 = 3 x 20 = 60
sudut 3 = 4 x 20 = 80