Diketaahui segitiga ABC,dengan sudut A=(2x+10)derajat B=(x+30)derajat C=(3x-10)derajat,maka besar masing masing sudut
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maka sudut A = 2x + 10 = 180
2x = 180 - 10
2x = 170
x = 85
sudut B = x + 30 = 180
x = 180 - 30
x= 150
sudut C = 3x + 10 = 180
3x = 180 - 10
3x= 170
x =56.6
mungkin begitu , ma,af kalau slah ya ? :)