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Izidor. Hafner
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Demonstrations 41  60 of 1086
Freese's Dissection of a Regular Nonagon into Two
Freese's Dissection of a Regular Octagon into Nine
Freese's Dissection of a Regular Pentagon to a Square
Freese's Dissection of Two Regular Pentagons into a Square
Freese's Dissection of a Regular Octagon into Four
Freese's Dissection of a Regular Dodecagon into Three
Freese's Dissection of a Regular Starlike Nonagram into Three Equilateral Triangles
Freese's Dissection of a Regular Pentagon into Two Smaller Ones
Freese's Two Dissections of a Regular Pentagon into Five
Freese's Dissection of Four Regular Dodecagons into a Square
Some Formulas Involving Quantifiers and Propositional Connections
Primitive Relation for Elliptic Geometry
2. Constructing a Point on a Cassini Oval
Equidistance and Betweenness in Euclidean Plane Geometry
Freese's Dissection of a Regular Hexagon into Three
Freese's Dissection of a Regular Dodecagon into Four Regular Dodecagons
Freese's Dissection of a Regular Dodecagon into Two Squares
Freese's Dissection of Two Regular Dodecagons into a Square
Freese's Dissection of a Regular Dodecagon into an Isosceles Right Triangle
31. Construct a Triangle ABC Given the Length of AB, an Adjacent Angle and the Difference of the Lengths of the Other Two Sides
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