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sudut ke 1 = x
sudut ke 2 = y
Diket : x = 3y
Jwb : x + y = 90
3y + y = 90
4y = 90
y = 22,5
x = 3y
= 3(22,5)
= 67,5
jadi, sudut ke 1 = 22,5
sudut ke 2 = 67,5