# Plane and Solid Geometry

American Book Company, 1908 - Geometry - 340 pages
0 Reviews
Reviews aren't verified, but Google checks for and removes fake content when it's identified

### What people are saying -Write a review

We haven't found any reviews in the usual places.

### Contents

 PLANE GEOMETRY 9 Angles 15 Constructions 31 50 54 65 72 Method of Attack 35 Parallels 48 The CIRCLE 81 Definitions and Theorems 93 Historical Note 99 BOOK III 117
 Constructions 123 135 138 123 Similar Triangles 131 AREAS OF POLYGONS 147 SYLLABUS OF PLANE GEOMETRY 216 Space 225 111 285 Copyright

### Popular passages

Page 63 - The line which joins the mid-points of two sides of a triangle is parallel to the third side and equal to one half of it.
Page 128 - The straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it.
Page 217 - If two triangles have two sides of one respectively equal to two sides of the other, and the included angles unequal, the triangle which has the greater included angle has the greater third side. 132. If two triangles have two sides of...
Page 134 - If in a right triangle a perpendicular is drawn from the vertex of the right angle to the hypotenuse : I. The two triangles thus formed are similar to each other and to the whole triangle. II. The perpendicular is a mean proportional between the segments of the hypotenuse.
Page 120 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.
Page 221 - If the product of two numbers -is equal to the product of two other numbers, either pair may be made the means, and the other pair the extremes, of a proportion.
Page 223 - Prove that in any triangle the square on the side opposite an acute angle is equivalent to the sum of the squares on the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side.
Page 131 - If two polygons are composed of the same number of triangles, similar each to each, and similarly placed, the polygons are similar.
Page 255 - An oblique prism is equivalent to a right prism whose base is a right section of the oblique prism, and whose altitude is equal to a lateral edge of the oblique prism. Hyp. OM is a right section of oblique prism AD', and OM ' a right prism whose altitude is equal to a lateral edge of AD'.
Page 221 - In any proportion, the product of the means is equal to the product of the extremes.