U trokutu

s tupim kutem

vrijedi da je duljina

jednaka udaljenosti točke

od ortocentra danog trokuta. Odredi koliko iznosi kut u vrhu

.
In triangle

with an obtuse angle at

the length

is equal to the distance from

to the ortocenter of

. Find the measure of the angle at

.
[lang=hr]
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 $A$.
[/lang]
[lang=en]
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 $A$.
[/lang]