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sudut 1 = 3x
sudut 2 = 4x+5
sudut 3 = 3x+5
jumlh sudut segitiga = 180
maka :
180 = sudut (1+2+3)
180 = 3x + 4x+5 + 3x+5
180 = 10x + 10
10x = 180-10
x = 170/10
x = 17 derajt
jadi besr sudut :
sudut 1 = 3x = 3 x 17 = 51 derajt
sudut 2 = 4x+5 = 4 x 17 + 5 = 73 derajt
sudut 3 = 3x+5 = 3x17 + 5 = 56 derajt
jadi sudut terbesar = 73 derajt
10x + 10 = 180°
10x = 170°
x = 17 ...
sudut 3x = 3 x 17 = 51°
sudut 4x+5 = 4 x 17 + 5 = 68 + 5 = 73°
sudut 3x+5 = 3 x 17 + 5 = 56
jadi , sudut terbesar adalah 4x+5 = 73°