Introduction and books 1,2 (Google eBook)

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The University Press, 1908 - Mathematics, Greek
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Review: The Thirteen Books of the Elements, Vol. 1 (The Elements #1)

User Review  - Kellie - Goodreads

I read this, "proved" most of the propositions, and understood about 1/3 of it. Read full review

Review: The Thirteen Books of the Elements, Vol. 1 (The Elements #1)

User Review  - Dianna Caley - Goodreads

This was fun to read. I haven't done proofs since high school. I forgot how much fun they are. Read full review

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Page 402 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Page 218 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Page 307 - If two triangles have two sides of the one equal to two sides of the...
Page 202 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Page 218 - In any triangle, the sum of the three angles is equal to two right angles, or 180.
Page 176 - A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line.
Page 181 - When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that on which it stands.
Page 315 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.
Page 190 - Parallel straight lines are straight lines which, being in the same plane and being produced indefinitely in both directions, do not meet one another in either direction.
Page 259 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of' the base, equal to one another, and likewise those which are terminated in the other extremity.

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