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Convergence articles

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A certain merchant increases the value of his estate by 1/3...
Four episodes in the history of geometry are discussed, where dynamic geometry helps in understanding the ideas.
A set of n disjoint, congruent circles packs the surface of a sphere S so that each region of the surface exterior to the circles is bounded by arcs of three of the circles.
A horse halving its speed every day runs 700 miles in 7 days.
Prove that if the sums of the square opposite sides of any quadrilateral are equal, its diagonals interect at right angles.
This 1989 revision of the 1969 NCTM yearbook still provides wonderful suggestions for using the history of mathematics in the classroom.
Considering non-unique representation of Maya calendar numbers may help your students understand their own number system better.
This is the title page to the 1811 edition of the Descriptive Geometry of Gaspard Monge (1746-1818). This book deals with methods for representing three-dimensional objects in two dimensions. It was written to accompany Monge's courses at the Ecole Polytechnique in Paris.
Given four numbers whose sum is 9900; the second exceeds the first by 1/7 of the first...
A thorough study of Benjamin Franklin's mathematical accomplishments, in particular his work on magic squares.

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