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By William C. Bartol

From the PREFACE.
i've got written this e-book, having in view the last word development of the direction in arithmetic provided at Bucknell collage, and taking into consideration that the crowded curricula supply to this direction much less time and extra matters than was once the case twenty-five years ago.
In sporting ahead a process mathematical learn, not anything could make amends for hasty or imperfect training. besides the fact that, on account that airplane Geometry is a nearly common requirement for admission to varsity, it turns into attainable, via the doorway examinations, to go into within the topic of sturdy Geometry, in basic terms these scholars who're already good proficient in Euclidian equipment of demonstration and investigation.
Believing that for such scholars the direction in good Geometry could be made fairly short with the final word good thing about having extra time for complex arithmetic, I provide this brief direction. In it are a few theorems for unique demonstration and lots of illustrative examples. a piece on Mensuration is brought with the layout of calling exact awareness, via illustrative examples, to all of the vital ideas for locating volumes and surfaces of solids, confirmed within the previous sections. additionally, equipment for locating the volumes of the normal Polyedron, the Wedge, and the Prismoid are deduced.
For the aim of bringing the real theorems as close to as attainable to the definitions, postulates, etc., on which they relaxation, i've got chanced on it essential to deviate a bit of from the standard series of propositions. hence, i've got grouped within the comparable part the prism and its restricting case, the cylinder, simply because they've got such a lot of homes in universal. i've got handled the pyramid and its restricting case, the cone, in like demeanour, and so forth.
continuously, i've got aimed to offer the main direct evidence attainable, and to save lots of the coed, by way of corollaries, the hard work of reproducing structures unnecessarily.
An adventure of 20 years in instructing arithmetic leads me to imagine that the coed who will get up the topic from this short paintings, finally could be at no drawback from no longer having used a few one in every of our greater well known textbooks.
a number of the diagrams utilized in representation are, via permission, from Professor Wells' geometry. In thanking him for this act of courtesy, I hope additionally to recognize my indebtedness to him for beneficial relief rendered me throughout the supplier of his text-books, a few of which i've got had in class-room use from the date in their booklet.

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