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Verified answer
Diketahui:∠DAB = ∠ABC = (7x° + 10°)
∠BCD = ∠CDA = 10x°
Ditanya:
∠BCD = ?
Jawaban:
360° = 2(10x)° + 2(7x° + 10°)
360° = 20x° + 14x° + 20°
360° = 34x° + 20°
34x° = 360° - 20°
34x° = 340°
x° = 340° : 34°
x° = 10°
Maka:
∠BCD = 10x° = 10(10)° = 100°
Jawaban: B.
Semoga menbantu :)
Verified answer
Mata Pelajaran : MatematikaMateri : Sudut