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khanacademy

Khanacademy

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30-60-90 Triangle Example Problem

10/05/11
Using what we know about 30-60-0 triangles to solve what at first seems to be a challenging problem

The Golden Ratio

10/05/11
An introduction to one of the most amazing ideas/numbers in mathematics

45-45-90 Triangle Side Ratios

10/04/11
Showing the ratios of the sides of a 45-45-90 triangle are 11sqrt2

30-60-90 Triangle Side Ratios Proof

10/04/11
Proving the ratios between the sides of a 30-60-90 triangle

Pythagorean Theorem Proof Using Similarity

10/04/11
Proof of the Pythagorean Theorem using similarity

Finding Area Using Similarity and Congruence

10/04/11
Example of using similarity and congruence to find the area of a triangle

Similar Triangle Example Problems

10/04/11
Multiple examples looking for similarity of triangles

Health Care Costs in US vs Europe

10/04/11
A discussion about US health care costs

Conversation About Drug Pricing

10/03/11
Dr. Lauwrence Baker talks to Sal about how drug prices are set

Blue Cross and Blue Shield

10/03/11
Sal and Dr. Baker talk a bit about Blue Cross and Blue Shield

Inflammation

10/03/11
Dr. David Agus talks about inflammation while Sal repeatedly misspells it with one 'm'