Dyscalculia: News from the web:
Math Unfolded: An Exhibit of Mathematical Origami Art,” to show math buffs and art fans alike how geometry, algorithms and math formulas can create exciting works of art through the science of origami.
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Dyscalculia: News from the web:
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Dyscalculia: News from the web:
With a wife specializing in learning difficulties, a Canadian psychologist called Keith Stanovich had long been interested in the ways that some mental abilities may lag behind others, and he suspected that rationality would be no different. The result was an influential paper introducing the idea of dysrationalia as a direct parallel to other disorders like dyslexia and dyscalculia.
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Dyscalculia: News from the web:
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Dyscalculia: News from the web:
So let’s look at the history of Pi:
Pi (π) has been known for almost 4000 years—but even if we calculated the number of seconds in those 4000 years and calculated π to that number of places, we would still only be approximating its actual value. Here’s a brief history of finding π.
The ancient Babylonians calculated the area of a circle by taking 3 times the square of its radius, which gave a value of pi = 3. One Babylonian tablet (ca. 1900–1680 BC) indicates a value of 3.125 for π, which is a closer approximation.
The Rhind Papyrus (ca.1650 BC) gives us insight into the mathematics of ancient Egypt. The Egyptians calculated the area of a circle by a formula that gave the approximate value of 3.1605 for π.
The first calculation of π was done by Archimedes of Syracuse (287–212 BC), one of the greatest mathematicians of the ancient world.
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