Равные отрезки АВ и CD, не лежащие на одной прямой, пересекаются в точке О. Известно, что АО = СО. Докажите, что ∠OAD = ∠OCB.

The film "The Vow" - very impressive and emotional film. This film is based on the intricaciesfeelings, emotions and human relations. The story is about that if you love - fight for their love and overcome difficulties. We have to fight to the last, never let go of a loved one, do your best and nevozmozhnoe.Nesmotrya the fact that Paige had forgotten her husband, he again decides to win her heart, to be by her side. Who is rarely met in real life. This movie makes you think about many things. We can say this film about "fairy love." After viewing the remains pleasant, warm feeling. Just a pity that by Paige memory never returned. 

Oath" is a very impressive and emotional film. This film is based on the intricacies
feelings, emotions and human relationships. The story is that if you love fight for your love and overcome difficulties. We must fight to the last , never let go of a loved one, to do everything possible and impossible.Despite the fact that Paige had forgotten husband, he again decides to win her heart, to be near her. Now rarely met in real life. This movie makes you think a lot. You can tell this film is about "fairytale love". After viewing the remains pleasant, warm feeling. Just a pity that to Paige's memory never returned.