Răspuns :
<) ADC =180-ADB =180-70 =110 gr
<)DAC =180 -(ADC +ACD ) =180-(110+20) =180-130 =50 gr
<) BAD=90-DAC =90-50 =40 gr
<) ABD =180-(BAD+ADB ) =180-(40+30) =180-110 =70 gr
<)DAC =180 -(ADC +ACD ) =180-(110+20) =180-130 =50 gr
<) BAD=90-DAC =90-50 =40 gr
<) ABD =180-(BAD+ADB ) =180-(40+30) =180-110 =70 gr