# Elements of Plane Geometry, Parte1

Harper & Brothers, 1878 - 132 páginas

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### Contenido

 BOOK I 11 Hints to Teachers 18 Lines Angles and Triangles 44 Quadrilaterals Squares 63 BOOK III 70
 Test Examples 82 BOOK IV 89 BOOK V 95 Proportion applied to Figures 114 APPENDIX 125

### Pasajes populares

Página 48 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Página 26 - PROB. from a given point to draw a straight line equal to a given straight line. Let A be the given point, and BC the given straight line : it is required to draw from the point A a straight line equal to BC.
Página 46 - 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 sides.
Página 45 - If one side of a triangle be produced, the exterior angle is greater than either of the interior, and opposite angles.
Página 63 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line. Let...
Página 64 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Página 114 - If from a point without a circle, a tangent and a secant be drawn, the tangent will be a mean proportional between the secant and its external segment.
Página 57 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Página 57 - Parallelograms upon the same base and between the same parallels, are equal to one another.
Página 69 - The sum of the squares on the sides of a parallelogram is equal to the sum of the squares on the diagonals.