Question

Vă rog !!! Dau coroana !!!​

Answer 1

Răspuns:

17. <A=180-100=80

<B=180-140=40

<C=180-(80+40)=180-120=60

18.a)AB||DE

b)m(<E)=180-130=50

m(<DCE)=180-(80+50)=180-130=50

m(<BCA)=50(unghiurile opuse la varf sunt congruente)

m(<A)=180-100=80