(Episode 1)
Physicist Jim Al-Khalili travels through Syria, Iran, Tunisia and Spain to tell the story of the great leap in scientific knowledge that took place in the Islamic world between the 8th and 14th centuries.
Its legacy is tangible, with terms like algebra, algorithm and alkali all being Arabic in origin and at the very heart [...]
Fun Math Trick! Squaring Numbers Near 100.
A neat way to square numbers near 100 without having to multiply it out the long way!
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Duration : 0:3:10
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/areaofacircle.php Students learn that the formula for the area of a circle is pi times radius squared, so the area of a circle that has a radius of 5 inches is pi times 5 squared, or 25 pi square inches. And since pi = 3.14, 25 pi square [...]
