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Verified answer
180°=<a+<b180°=x+2x
180°=3x
x=60
jadi, besar sudut a=1*60= 60
besar sudut b= 2*60= 120
Besar sudut a= sudut c
jadi besar sudut c= 60°
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Verified answer
360:2= 180sdt A:
1+2=3
x 180= 60
sdt A = sdt C maka Sdt C adalah 60drjt