ACE + EAC + y = 180°
52° + 35° + y = 180°
y= 180° - 87° = 93°
ADC =180° - 35° - 32° = 113°
maka BDA = 180° - 113° = 67°
krn AD adl garis bagi BAC, maka
BAD = DAC = 35°
35° + x + 67° = 180°
x + 102° = 180°
x = 180°-102° = 78°
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ACE + EAC + y = 180°
52° + 35° + y = 180°
y= 180° - 87° = 93°
ADC =180° - 35° - 32° = 113°
maka BDA = 180° - 113° = 67°
krn AD adl garis bagi BAC, maka
BAD = DAC = 35°
35° + x + 67° = 180°
x + 102° = 180°
x = 180°-102° = 78°