## Elements of Geometry and Trigonometry: From the Works of A.M. Legendre |

### From inside the book

Results 1-5 of 18

Page 94

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**lower base**. 6. The ALTITUDE OF A TRAPEZOID , is the perpendicular distance between its parallel sides . These sides are called bases ; one the upper , and the other , the**lower base**. 7. The AREA OF A SURFACE , is its numerical ... Page 95

... base and an equal altitude . Let the triangle ABC , and the parallelogram ABFD , have equal bases and equal ...

... base and an equal altitude . Let the triangle ABC , and the parallelogram ABFD , have equal bases and equal ...

**lower base**A of the parallelogram ; BA B then , because they have equal altitudes , the vertex of the triangle will lie ... Page 178

... bases of the prism ; one the upper , and the other the

... bases of the prism ; one the upper , and the other the

**lower base**; the parallelograms taken together make up the lateral or convex surface of the prism ; the lines in which the lateral faces meet , are called lateral edges of the ... Page 180

... base is a regular polygon , and in which the perpendicular drawn from the vertex to the plane of the base , passes ...

... base is a regular polygon , and in which the perpendicular drawn from the vertex to the plane of the base , passes ...

**lower base**of the frustum . 14. The ALTITUDE of a frustum of a pyramid , is the per- pendicular distance between ... Page 185

... base ( D. 11 ) : hence , the lateral edges , SA , SB , & c . , are all equal ( B. VI . , P. V. ) ; but the sides of ...

... base ( D. 11 ) : hence , the lateral edges , SA , SB , & c . , are all equal ( B. VI . , P. V. ) ; but the sides of ...

**lower bases**, multiplied by the slant height . Let ABCDE - e be a frustum of a right pyramid , whose vertex is S : then ...### Other editions - View all

### Common terms and phrases

ABē ABCD ACē adjacent angles altitude apothem Applying logarithms base and altitude bisect centre chord circle circumference circumscribed coincide cone consequently convex surface corresponding cosec cosine Cotang cylinder denote diagonals diameter difference distance divided draw drawn edges equally distant feet find the area Formula frustum given angle given straight line greater hence homologous hypothenuse included angle interior angles intersection less Let ABC log sin lower base mantissa 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 polygons right angles right-angled triangle Scholium secant segment semi-circumference side BC similar sine slant height sphere spherical polygon spherical triangle square subtracted Tang tangent THEOREM triangle ABC triangular prisms triedral angle upper base vertex vertices whence

### Popular passages

Page 126 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.

Page 59 - A'B'C', and applying the law of cosines, we have cos a' = cos b' cos c' + sin b' sin c' cos A'. Remembering the relations a' = 180° -A, b' = 180° - B, etc. (this expression becomes cos A = — cos B cos C + sin B sin C cos a.

Page 18 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.

Page 104 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.

Page 6 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.

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

Page 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.

Page 99 - The area of a parallelogram is equal to the product of its base and altitude.

Page 172 - If two planes are perpendicular to 'each other, a straight line drawn in one of them, perpendicular to their intersection, will be perpendicular to the other.

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.