Added: 2 years ago
From: khanacademy
Views: 34,792
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  • time to pass my geometry test!

  • should give us numbers with the examples

  • thumbs up for hd

    

  • has any1 told y that u have awesome handwriting?

  • sounds like frank zappa teaching geometry :)

  • Sal. Even though this video help, it would been better if you state the theroem and postulate.

  • Wait isn't that angle at 5:03 supposed to be a linear angle too? 

  • *****

  • If you construct a triangle from the ends of the diameter which is equilateral so that the apex is located on the centre of the arc of a hemisphere of the circle, that angle must be 90 degrees. Bisecting it to the centre creates angles at the centre of 90 and at the circumference of 45giving the same result visually. This is visual but the algebra covers all eventualities. Love your videos.

  • hehe :D

  • AWESOME! Best man alive :D

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