1. exceptie d) - in rest toate sunt corecte
2.
a) ∡AOB, ∡ACO, ∡AOD, ∡AOE,∡BOC, ∡BOD,∡BOE, ∡COD, ∡COE, ∡DOE
b) ∡AOB, ∡BOC, ∡COD, ∡DOE
c) ∡DOF, ∡FAD
3.
a) fals
b) adevarat
c) adevarat
5.
Figura 2: ∡ABC, ∡ABD,∡CBD
Figura 3: ∡AOB, ∡AOC, ∡AOD, ∡BOC, ∡BOD, ∡BOE, ∡COD, ∡COE, ∡COF, ∡DOE, ∡DOF,∡DOA, ∡EOF, ∡EOA, , ∡FOA, ∡FOB
∡AOD, ∡BOE si ∡COF sunt alungite, restul sunt proprii
