- #1
Petrus
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Hello MHB,
I am working with a exemple that I think they got some incorrect.
Exemple 10.Show that diagonals in a diamond(romb) is orthogonal.
I understand that \(\displaystyle AC•BD=0\) cause of dot product and if it's orthogonal the angle is \(\displaystyle \frac{\pi}{2}\)
I understand all the part until the step before the last one
Edit: last part got cut in picture, it should be: \(\displaystyle |BC|^2-|AB|^2=0\)
Regards,
\(\displaystyle |\pi\rangle\)
I am working with a exemple that I think they got some incorrect.
Exemple 10.Show that diagonals in a diamond(romb) is orthogonal.
I understand that \(\displaystyle AC•BD=0\) cause of dot product and if it's orthogonal the angle is \(\displaystyle \frac{\pi}{2}\)
I understand all the part until the step before the last one
![2dqqclx.jpg](http://i43.tinypic.com/2dqqclx.jpg)
Edit: last part got cut in picture, it should be: \(\displaystyle |BC|^2-|AB|^2=0\)
Regards,
\(\displaystyle |\pi\rangle\)
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