Let-H-be-orthocenter-of-ABC-and-O-its-circumcenter-Prove-that-the-vectors-OA-OB-OC-and-OH-satisfy-the-following-equality-OA-OB-OC-OH-

Question Number 16748 by Tinkutara last updated on 26/Jun/17

Let H be orthocenter of Δ A B C and O

its circumcenter . Prove that the vectors

\vec{O A}, \vec{O B}, \vec{O C} and \vec{O H} satisfy the

following equality :

\vec{O A} + \vec{O B} + \vec{O C} = \vec{O H}

Commented by mrW1 last updated on 26/Jun/17

it would be a great help when you

post a question as well as the diagram

to it if available .

Commented by mrW1 last updated on 26/Jun/17

I {don}^{'} t mean special questions . It is

generally helpful if diagram could also

be posted together with the question .

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