tolong bantu di jawab ya

(4x + 6)° + (7x - 4)° = 90°
11x + 2° = 90°
11x = 90° - 2°
11x = 88°
x = 88°/11 = 8°

<AOC = <AOD + <DOC
= 90° + (4x + 6)°
= 90° + (4(8) + 6)°
= 90° + (32 + 6)°
= 90° + 38°
= 128°

[tex]\text{Sudut AOB adalah sudut pelurus, besarnya 180}^o\\\\\text{AOB = 180}^o\\\text{AOD + DOC + COB = 180}^o\\\text{90 + (4x + 6) + (7x - 4) = 180}\\\text{11x + 92 = 180}\\\text{11x = 180 - 92}\\\text{11x = 88}\\\text{x = 8}\\\\\text{Besar AOC adalah ...}\\\text{AOC = AOD + DOC}\\\text{AOC = 90 + (4x + 6)}\\\text{AOC = 4x + 96}\\\text{AOC = 4(8) + 96}\\\boxed{\boxed{AOC = \,\text{128 derajat}}}[/tex]

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