By Irving Adler
More than a hundred workouts with solutions and two hundred diagrams light up the textual content. lecturers, scholars (particularly these majoring in arithmetic education), and mathematically minded readers will savor this striking exploration of the function of geometry within the improvement of Western clinical thought.
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Additional resources for A New Look at Geometry
The Valley and the Mountain Geometry today consists of many subdivisions. There are synthetic geometry, analytic geometry, and differential geometry. There are Euclidean geometry, hyperbolic geometry, and elliptic geometry. There are also metric geometry, affine geometry, projective geometry, and other branches besides. The subdivisions of geometry have been compared to the distinguishable regions within a complex landscape. Most of these regions are in a valley. An explorer who is deep within one region can easily lose sight of the fact that the other regions exist.
If m is any counting number, and n is any counting number except 0, we use the labels and respectively for the points to the right and left of 0 at a distance of units. The points labeled in this way constitute the rational number system. Each rational number is represented by many equivalent fractions. Rational numbers may be added and multiplied in accordance with the familiar rules Fields The operations addition and multiplication in the rational number system have the following properties: If x, y and z are any rational numbers, 1.
The discovery arose in connection with the problem of comparing the length of one line with the length of another. Suppose when we compare a short line r with a longer line s we find that r fits exactly a whole number of times into s. Then we say that r is a measure of s, and s is a multiple of r. For example, if r fits into s three times, s = 3r, and s/r = 3/1. Moreover, if r is chosen as the unit of length, then the length of s is 3 = 3/1. If r does not fit exactly a whole number of times into s, it may be possible to find a smaller length t that fits a whole number of times into both r and s.