editions:UOM39015065618988

All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sidef. For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by drawing...

The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ... - Page 35
by Robert Simson - 1806 - 518 pages
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Mathematics at the Cross-roads: A Critical Survey of the Teaching of ...

Abraham Johannes van Zyl - Education - 1942 - 239 pages

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Mathematics in Aristotle

Sir Thomas Little Heath - Geometry - 1949 - 291 pages

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Engineering Drawing: Including Introductory Practical Design Data for ...

Herbert Thomas Davey, Robert James Wilkins - Design, Industrial - 1952 - 392 pages

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The Transactions of the Canadian Mining Institute, Volume 15

Canadian Mining Institute - Mineral industries - 1912

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On Intelligence

Hippolyte Taine - Psychology - 1998 - 588 pages

...together equal to four right angles ; hence it follows that the polygon contains a number of angles which, together with four right angles, are equal to twice as many right angles as there are sides. — Here the explanatory intermediate is a character comprised in all the elements...

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