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### Inhoudsopgave

 INTRODUCTION 1 On Reasoning 8 On the Representation of Geometrical Figures 14 PLANE GEOMETRY 33 ON CURVES 76 PROBLEMS 106 LINES 131
 ON PROPORTIONAL LINES 173 PROBLEMS 183 ON RECTILINEAR PLANE FIGURES 199 ON SYMMETRIC PLANE FIGURES 256 PROBLEMS 296 On Equivalence generally 317 THEOREMS 381

### Populaire passages

Pagina 224 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Pagina 200 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Pagina 228 - 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.
Pagina 143 - When a straight line standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a, right angle ; and the straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity of any thing.
Pagina 216 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Pagina 200 - The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.
Pagina 268 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Pagina 43 - The projection of a point on a plane is the foot of the perpendicular drawn from the point to the plane.
Pagina 335 - Assuming that the areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles...
Pagina 382 - FLC, there -are two angles -of the one equal to two angles of the other, each to each ; and the side FC which is adjacent to the equal...