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180= 6x
x = 30
Sudut 1 = x = 30
Sudut 2 = 2x = 60
Sudut 3 = 3x = 90
sudut 2 = 2x
sudut 3 = 3x
jumlh sudut segitiga = 180 derajat
maka :
180 = sudut (1+2+3)
180 = x + 2x + 3x
180 = 6x
x = 180/6
x = 30 derajat
jadi besar sudut segitiga :
sudut 1 = 30
sudut 2 = 2 x 30 = 60
sudut 3 = 3 x 30 = 90