Răspunsuri

  • Utilizator Brainly
2014-09-11T13:57:17+03:00
M(<DCA)=a°
m(ACB)=b°
Daca AD=DC atunci Δ DAC este isoscel  ci <DAC=DCA=a
Daca AB||CD atunci <BAC=<ACD=a
=> <BAD=<BAC+<CAD=a+a
<BAD=2*a°

<ADC=180-<DAC-<ACD=180-a-a
<ADC=180°-2*a°

<BCD=<ACB+<ACD
<BCD=a°+b°

<ABC=180-<BAC-<BCA
<ABC=180°-a°-b°

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