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Plane Geometry
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Demonstrations 61  80 of 1270
Freese's Dissection of a Regular Pentadecagon into Two
Tangents to an Ellipse from a Given Point
Freese's Dissection of a Regular Decagon into Five
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 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
Primitive Relation for Elliptic Geometry
Equidistance and Betweenness in Euclidean Plane Geometry
Area and Perimeter of a Rectangle
31. Construct a Triangle ABC Given the Length of AB, an Adjacent Angle and the Difference of the Lengths of the Other Two Sides
30. Construct a Triangle ABC Given the Length of AB, the Angle at C and the Difference of the Other Two Sides
29. Construct a Triangle ABC Given the Length of AB, the Angle at C and the Sum of the Other Sides
Pasch's Axiom in Euclidean Geometry
28. Construct a Triangle ABC Given the Length of AB, the Sum of the Other Two Sides, and a Line Containing C
1. Constructing a Point on a Cassini Oval
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