## Elements of Geometry and Trigonometry |

### From inside the book

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**drawn**can be**drawn**between two points . 12. The shortest distance between any two points is mea- sured on the straight line which joins them . 13. Through the same point , only one line can be**drawn**parallel to a given line . POSTULATES ... Page 19

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**drawn**, making with a given line an angle equal to a given angle . 8. A line may be**drawn**through a given point , parallel to a given line . NOTE . In making references , the following abbreviations are employed , viz . : A. for ... Page 28

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**drawn**, making the angle CAG equal to the angle D ( Post . 7 ) ; make AG equal to DE , and**draw**GC . Then will the triangles AGC and DEF have two sides and the included angle of the one equal to two sides and the included angle of ... Page 31

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**drawn**from the vertex of an isosceles triangle to the middle of the base , bisects the vertical angle , and is ...**draw**DC . Then , in the triangles ABC , DBC , we have the side BD equal to AC , by construction , the side BC common ... Page 33

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**drawn**through A. A D- B E F For , suppose a second perpendicular AC to be**drawn**. Prolong AB till BF is equal to AB , and**draw**CF Then , the triangles ABC and FBC will have AB equal to BF , by construction , CB common , CB common , and ...### Other editions - View all

Elements of Geometry and Trigonometry: From the Works of A. M. Legendre Adrien Marie Legendre,Charles Davies No preview available - 2016 |

### Common terms and phrases

ABē ABCD ACē adjacent angles altitude angle ACB apothem Applying logarithms base and altitude centre chord circle circumference circumscribed coincide cone consequently convex surface corresponding cosec Cosine Cotang cylinder denote diameter distance divided draw drawn edges equally distant feet find the area Formula frustum given angle given line greater hence homologous hypothenuse included angle interior angles intersection less Let ABC log sin logarithm lower base mantissa mean proportional measured by half number of sides opposite parallel parallelogram parallelopipedon perimeter perpendicular plane MN polyedral angle polyedron prism PROPOSITION proved pyramid quadrant radii radius rectangle regular polygon right-angled triangle Scholium secant segment semi-circumference side BC similar Sine slant height sphere spherical angle spherical polygon spherical triangle square straight line Tang tangent THEOREM triangle ABC triangular prisms upper base vertex vertices whence

### Popular passages

Page 28 - If two triangles have two sides of the one equal to two sides of the...

Page 100 - The area of a triangle is equal to half the product of its base by its altitude.

Page 99 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.

Page 59 - A chord is a straight line joining the extremities of an arc.

Page 124 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.

Page 214 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.

Page 43 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.

Page 52 - If the product of two quantities is equal to the product of two other quantities, two of them may be made the extremes, and the other two the means of a proportion.

Page 123 - Similar triangles are to each other as the squares of their homologous sides.

Page 182 - The upper end of the frustum of a pyramid or cone is called the upper base...