Vrijeme: 23:14

Noli turbare circulos meos #3

U trokutu \triangle ABC s tupim kutem A vrijedi da je duljina \lvert BC\rvert jednaka udaljenosti točke A od ortocentra danog trokuta. Odredi koliko iznosi kut u vrhu A.
In triangle \triangle ABC with an obtuse angle at A the length \lvert BC\rvert is equal to the distance from A to the ortocenter of \triangle ABC . Find the measure of the angle at A.