# taxicab geometry formula

This system of geometry is modeled by taxicabs roaming a city whose streets form a lattice of unit square blocks (Gardner, p.160). dT(A,B) = │(a1-b1)│+│(a2-b2)│ Why do the taxicab segments look like these objects? This formula is derived from Pythagorean Theorem as the distance between two points in a plane. Take a moment to convince yourself that is how far your taxicab would have to drive in an east-west direction, and is how far your taxicab would have to drive in a The triangle angle sum proposition in taxicab geometry does not hold in the same way. This is called the taxicab distance between (0, 0) and (2, 3). On the right you will find the formula for the Taxicab distance. In this paper we will explore a slightly modi ed version of taxicab geometry. So how your geometry “works” depends upon how you define the distance. 20 Comments on “Taxicab Geometry” David says: 10 Aug 2010 at 9:49 am [Comment permalink] The limit of the lengths is √2 km, but the length of the limit is 2 km. The taxicab circle centered at the point (0;0) of radius 2 is the set of all points for which the taxicab distance to (0;0) equals to 2. TWO-PARAMETER TAXICAB TRIG FUNCTIONS 3 can deﬁne the taxicab sine and cosine functions as we do in Euclidean geometry with the cos and sin equal to the x and y-coordinates on the unit circle. means the distance formula that we are accustom to using in Euclidean geometry will not work. Introduction Taxicab geometry diﬀers from Euclidean geometry by how we compute the distance be-tween two points. 2. So, this formula is used to find an angle in t-radians using its reference angle: Triangle Angle Sum. 1. Taxicab Geometry If you can travel only horizontally or vertically (like a taxicab in a city where all streets run North-South and East-West), the distance you have to travel to get from the origin to the point (2, 3) is 5. So, taxicab geometry is the study of the geometry consisting of Euclidean points, lines, and angles inR2 with the taxicab metric d((x 1;y 1);(x 2;y 2)) = jx 2 −x 1j+ jy 2 −y 1j: A nice discussion of the properties of this geometry is given by Krause [1]. Indeed, the piecewise linear formulas for these functions are given in [8] and [1], and with slightly di↵erent formulas … The movement runs North/South (vertically) or East/West (horizontally) ! Euclidean Geometry vs. Taxicab Geometry Euclidean formula dE(A,B) = √(a1-b1)^2 + (a2-b2)^2 Euclidean segment What is the Taxicab segment between the two points? taxicab distance formulae between a point and a plane, a point and a line and two skew lines in n-dimensional space, by generalizing the concepts used for three dimensional space to n-dimensional space. This difference here is that in Euclidean distance you are finding the difference between point 2 and point one. Above are the distance formulas for the different geometries. On the left you will find the usual formula, which is under Euclidean Geometry. There is no moving diagonally or as the crow flies ! Key words: Generalized taxicab distance, metric, generalized taxicab geometry, three dimensional space, n-dimensional space 1. Draw the taxicab circle centered at (0, 0) with radius 2. Movement is similar to driving on streets and avenues that are perpendicularly oriented. Taxicab Geometry ! Fortunately there is a non Euclidean geometry set up for exactly this type of problem, called taxicab geometry. However, taxicab circles look very di erent. The reason that these are not the same is that length is not a continuous function. The distance formula for the taxicab geometry between points (x 1,y 1) and (x 2,y 2) and is given by: d T(x,y) = |x 1 −x 2|+|y 1 −y 2|. If, on the other hand, you Problem 8. Second, a word about the formula. taxicab geometry (using the taxicab distance, of course). 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