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Convergence articles

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A set of four congruent circles whose centers form a square is inscribed in a right triangle ABC where C is the right angle and serves as one corner of the square. Find their radius in terms of the sides; a,b,c, of the triangle.
The annual meeting of the NCTM contains numerous sessions dealing with the history of mathematics.
A circle, a square and an equilateral triangle all have the same perimeter equal to 1 meter. Compare their areas.

Images of the first printed edition of Euclid's Elements

The first detailed biography of James Joseph Sylvester.
The number 50 is divided by a certain number. If the divisor is increased by 3, the quotient decreases by 3.75. What is the number?

A discussion of why we use "e" to represent the base of the natural logarithm system.

The highest point of the Andes is about 4 miles above sea level.
Suppose a man had put out one cent at compound interest in 1620, what would have been the amount in 1824, allowing it to double once in 12 years?
Now there are six-headed four legged animals and four-headed two-legged birds. Find the total number of animals and birds.

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