T. Sundara Row's Geometric Exercises in Paper Folding

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Open court Publishing Company, 1901 - Geometry - 148 pages
 

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Page 147 - Cycloid. The cycloid is a curve generated by a point on the circumference of a circle which rolls on a straight line tangent to the circle.
Page 73 - ... of regular inscribed and circumscribed polygons having double the number of sides. Let AB be a side of the given inscribed polygon ; EF, parallel to AB, a side of the circumscribed polygon, and C the centre of the circle.
Page 98 - The common point is called the orthocenter. (3) The perpendicular bisectors of the sides of a triangle are concurrent. The common point is called the circum•center.
Page 126 - RA and RA'. Fold AP perpendicular to AR, meeting RA' in P. For different positions of R in DR, the locus of P is an ellipse, of which A A
Page 90 - Nay, that the three angles of a triangle are together equal to two right angles, is not a primitive judgment, for it needs other truths coming between to carry our conviction.
Page 149 - Price, $1.oo (5s.). DE MORGAN, AUGUSTUS. ON THE STUDY AND DIFFICULTIES OF MATHEMATICS. New Reprint edition with notes. Pp. viii+288. Cloth, $1.25 (5s.).
Page xiv - I have sought not only to aid the teaching of Geometry in schools and colleges, but also to afford mathematical recreation to young and old, in an attractive and cheap form. " Old boys " like myself may find the book useful to revive their old lessons, and to have a peep into modern developments which, although very interesting and instructive-, have been ignored by the Madras University.
Page 134 - K perpendicular to AB; at the middle point of BC draw EF perpendicular to B C. These two perpendiculars intersect at O.

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