3x + 2x + 60 = 180
5x + 60 = 180
5x = 120
x = 24
.
sudut A =3x = 3 (24) = 72 (d)
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3x + 2x + 60 = 180
5x + 60 = 180
5x = 120
x = 24
.
sudut A =3x = 3 (24) = 72 (d)