Răspuns :
Răspuns:
1. 1=55 grade si este congruent cu 3=tot 55 grade
55+55=110 grade cele 2 unghiuri
360-110=250grade ramase pt unghiurile 2 si 4
dar si ele sunt congruente
250:2=125 grade fiecare unghi
2. 5=62grade
fiind congruent cu 7 are tot 62 grade
62+62=124grade
360-124=236grade ramase pt unghiurile 6 si 8
236:2=118 grade fiecare pt ca sunt congruente
[tex]\it 2)\\ \\ \hat1=\hat5=62^o\ (unghiuri\ corespondente)\\ \\ \hat3=\hat1=62^o (unghiuri\ opuse\ la\ v\hat{a}rf )\\ \\ \hat7=\hat5=62^o\ (unghiuri\ opuse\ la\ v\hat{a}rf )\\ \\ \hat2=118^o\ (suplementul\ lui\ 62^o)\\ \\ \hat4=\hat2=118^o\ (unghiuri\ opuse\ la\ v\hat{a}rf )\\ \\ \hat6=\hat4=118^o\ (alterne\ interne) \\ \\ \hat8=\hat4=118^o\ (unghiuri\ corespondente)\\[/tex]
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