The Poincaré Disk models this type of geometry for which a triangle's angles sum to less than 180 degrees.
The Poincaré Disk models this type of geometry for which a triangle's angles sum to less than 180 degrees. The cosine function named for this is equivalent to the traditional analog of the quantity x over the square root of negative one and is pronounced cosh [kawsh]. For 10 points, give this term that refers to the locus of all points with a constant ratio between the distances from the directrix and the focus in algebra or the conic section through both nappes of a cone in geometry, a degenerate form of which is two intersecting lines.
The Poincaré Disk models this type of geometry for which a triangle's angles sum to less than 180 degrees.
{Hyperbola} [Accept word forms including Hyperbolic Geometry Prompt on Non- Euclidean or Lobachevskian]