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Verified answer
ROT sudut pusatRST sudut keliling
Sudut pusat = 2 x sudut keliling
5x+8 = 2 ( 3x-6)
5x+8 =6x-12
5x-6x = -12-8
-x =-20
x=20
∠ROT =5x+8
=5(20)+8
=108°
jawab.D