# Elements of Geometry, Briefly, Yet Plainly Demonstrated by Edmund Stone

D. Midwinter, 1728

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### Contents

 Section 1 1 Section 2 5 Section 3 14 Section 4 23 Section 5 26 Section 6 47 Section 7 56 Section 8 85
 Section 16 126 Section 17 127 Section 18 130 Section 19 137 Section 20 146 Section 21 153 Section 22 160 Section 23 161

 Section 9 91 Section 10 92 Section 11 93 Section 12 108 Section 13 117 Section 14 119 Section 15 122
 Section 24 167 Section 25 176 Section 26 190 Section 27 193 Section 28 195 Section 29 202 Section 30 204

### Popular passages

Page 31 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Page 145 - Equal triangles which have one angle of the one equal to one angle of the other, have their sides about the equal angles reciprocally proportional : And triangles which have one angle in the one equal to one angle in the other, and their sides about the equal angles reciprocally proportional, are equal to one another.
Page 33 - ABD, is equal* to two right angles, «13. 1. therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together with four right angles; therefore all the exterior angles are equal to four right angles.
Page 27 - If two right-angled triangles have their hypotenuses equal, and one side of the one equal to one side of the other, the triangles are congruent.
Page 31 - The three angles of any triangle taken together are equal to the three angles of any other triangle taken together. From whence it follows, 2.
Page 11 - That a straight line may be drawn from any point to any other point. 2. That a straight line may be produced to any length in a straight line.