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<A : <B : <C
2 : 3 : 4
2x : 3x : 4x
sudut dlm segitiga = 180
180 = 2x + 3x + 4x
180 = 9x
x = 180/9
x = 20
<A = 2x = 2 x 20 = 40 derajat
<B = 3x = 3 x 20 = 60 derajat
<C = 4x = 4 x 20 = 80 derajat
= 2/9 . 180
= 40 derajat
sudut kedua = 3 / (2+3+4) . 180 derajat
= 3/9 . 180
= 60 derajat
sudut ketiga = 4 / (2+3+4) . 180 derajat
= 4/9 . 180
= 80 derajat