Tolong jwb yang no 8 nya yaa Satuu sajaa Pleasee,mw dkumpulinn Makasihh..

•sudut A = sudut A

• sudut B = ½ sudut C = ½ × 3⅓ sudut A = ½ × 10/3 sudut A = 5/3 sudut A

• sudut C = 3⅓ sudut A = 10/3 sudut A

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sudut A + B + C = 180°
A + 5/3 A + 10/3 A = 180°
3/3 A + 5/3 A + 10/3 A = 180°
18/3 A = 180°
6A = 180°
A = 30°

Jadi,
sudut A = 30°
sudut B = 5/3 A = 5/3 × 30° = 50°
sudut C = 10/3 A = 10/3 × 30° = 100°