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10x5=50
perbandingan sudut = 4 : 5
faktor pengali = x
penyelesaian :
sudut A + sudut B = 90
4x + 5x = 90
9x = 90
x = 90/9
x = 10 derajat
jadi :
besar sudut A = 4 x 10 = 40 derajat
besar sudut B = 5 x 10 = 50 derajat (sudut terbesar)