= 180° - 130°
= 50°
.
= 180° - 110°
= 70°
= 180° - -
= 180° - 50° - 70°
= 180° - 120°
= 60°
opsi D
Menentukan Sudut ABC
Sudut ABC + 130° = 180°
sudut ABC = 180 - 130°
Sudut ABC = 50°
Menentukan Sudut BCA
Sudut BCA + 110° = 180°
Sudut BCA = 180° - 110°
Sudut BCA = 70°
Menentukan Sudut BAC
Sudut ABC + Sudut BCA + Sudut BAC = 180°
50° + 70° + Sudut BAC = 180°
120° + Sudut BAC = 180°
Sudut BAC = 180° - 120°
Sudut BAC = 60° ( D)
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= 180° - 130°
= 50°
.
= 180° - 110°
= 70°
.
= 180° - -
= 180° - 50° - 70°
= 180° - 120°
= 60°
opsi D
Menentukan Sudut ABC
Sudut ABC + 130° = 180°
sudut ABC = 180 - 130°
Sudut ABC = 50°
________________
Menentukan Sudut BCA
Sudut BCA + 110° = 180°
Sudut BCA = 180° - 110°
Sudut BCA = 70°
________________
Menentukan Sudut BAC
Sudut ABC + Sudut BCA + Sudut BAC = 180°
50° + 70° + Sudut BAC = 180°
120° + Sudut BAC = 180°
Sudut BAC = 180° - 120°
Sudut BAC = 60° ( D)