Isaac's Stuff
Who wrote "Elements of Geometry?"
Who is Clairaut?
The shape Gauss did not consider when dealing with "continuous curvature"
What is a cone?
What are the four unavoidable sets?
Digon, triangle, quadrilateral, and pentagon
What method of proofs did Lambert and Saccheri use to try and prove the parallel postulate right?
What is Proof by contradiction?
The newly defined curve Nikolai Lobachevsky coined in his Geometrical Investigations on the Theory of Parallel Lines
What is the boundary line (or horocycle)?
Show a solution to Hamilton's 1859 Icosian game!
Let's see what you got!
Who wrote the earliest known work on curves in "space," or three dimensions?
Euclidean, Spherical, and Hyperbolic Geometries all differ in this way when transposing a triangle onto their space
What is the sum of the angles?
Euclid: =180°
Spherical: >180°
Hyperbolic: <180°
Did you use three colors?