If you're seeing this message, it means we're having trouble loading external resources on our website.

Hvis du sidder bag et internet-filter, skal du sikre, at domænerne *. kastatic.org og *.kasandbox.org ikke er blokeret.


Bevis for at vinkelsummen i en trekant er 180°

Vinkelsummen i en trekant er altid 180 grader. Her vil vi bevise denne sætning ved at tegne en linje der er parallel med en af trekantens side og som går gennem det modstående hjørne. Dernæst vil vi ved at bruge transversaller, topinkler og tilsvarende vinkler arrangere trekantens vinkler, så de danner en lige vinkel og derfor må have en sum på 180 grader. Lavet af Sal Khan.

Vil du deltage i samtalen?

Ingen opslag endnu.
Forstår du engelsk? Klik her for at se flere diskussioner på Khan Academys engelske side.

Video udskrift

Harriet island to fill the second saw Raquel the inventive English for axilla sets visca babysat saman at the inventive in Kerrville in second animal atonal fierce kiya risky babies Olivia pavo's building on Polly Lavinia or sands fair sailor Polly Linea a transverse Ayla risk appalling via Eldon Jana it's like Anton before Sarah then early need a big heart Nina force adapt in here he big hot Nina nurse [ __ ] and n lenita pal dil midden Huang Selenia tendon is Keiko Kim didn't help tinkle space the heavy Elsa girl biscuit I need Linea Takayama heartening Sabrina on Selenia parlay Linea cosas Alta Tito Linea appallingly the no acid Adam : a paella no falling a BT under to see the Evo's are plainly seconds refilling her then her teen Lila Linea then dealer linear a new and transfer sail to the top Palelei Linea this Stan transversal to topple a linear but a Vernon Hills Varna dinkler then having kill attended a transfer Satan or the no hongsi linear pair Adam Silvana Benkelman sons were Satan Arden flow linear Livington or Sahara for skank sponsor tea a big X we can see at the film's and top Fingal takes from will say this is gangs portal ever in on thinkers there these store some eggs he aims for the deer toughing la alas no falling it in systole needs again no sir the Newton connelly near arson transverse LCD belly Linea Bengal e a 10 mm 10 corner Oh hyung selenium ever until found a wrinkle didn't end in it Finkle e sparked it invincible so then having our silly me Erin topical to the hair yeah ah see I knew every vehicle it's a pony by visa Paul X but X are set here a space of England well yeah Davida Finkle mole here for Vimala x are set to something then a davidovich mole here for viola eggs are set to sun but i explicit explicit a supplement air tipping will be here then via think'll x plus set plus then relevantly Alima it hula our fears aha fingernail supplements here X plus set plus e the edema it who never asked our Ellie Mae it wound affairs car a new every fair DMAP visa summon at the inventive ink moly take Anton extra set Priscilla Kia eternal fears car the gear it will feel scar oh sorry fatty