Elements of Geometry and Trigonometry |
From inside the book
Results 1-5 of 10
Page 77
... measure of the angle . In Geometry , the right angle which is measured by a quarter of a circumference , or a quadrant , is taken as a unit . If , therefore , any angle be measured by one - half or two - thirds of a quadrant , it will be ...
... measure of the angle . In Geometry , the right angle which is measured by a quarter of a circumference , or a quadrant , is taken as a unit . If , therefore , any angle be measured by one - half or two - thirds of a quadrant , it will be ...
Page 78
... measured by half of the arc DE ; which was to be proved . 1 B E 2o . Let DAB be an inscribed angle , and let the centre lie within it then will the angle be measured by half of the arc BED . For , draw the diameter AE Then , from what ...
... measured by half of the arc DE ; which was to be proved . 1 B E 2o . Let DAB be an inscribed angle , and let the centre lie within it then will the angle be measured by half of the arc BED . For , draw the diameter AE Then , from what ...
Page 79
... measured by half of the same arc BOC . A B D E Cor . 2. Any angle BAD , in- scribed in a semi - circle , is a right an- gle ; because it is measured by half the semi - circumference BOD , or by a quadrant ( P. XVII . , S. ) . B A 0 in ...
... measured by half of the same arc BOC . A B D E Cor . 2. Any angle BAD , in- scribed in a semi - circle , is a right an- gle ; because it is measured by half the semi - circumference BOD , or by a quadrant ( P. XVII . , S. ) . B A 0 in ...
Page 80
... half the sum of the included arcs . Let DEB be an angle formed by the intersection of the chords AB and CD : then will it be measured by half the sum of the arcs AC and DB . For , draw AF parallel to DC : then , the are DF will be equal ...
... half the sum of the included arcs . Let DEB be an angle formed by the intersection of the chords AB and CD : then will it be measured by half the sum of the arcs AC and DB . For , draw AF parallel to DC : then , the are DF will be equal ...
Page 81
... measured by half the included , arc . Let BE be tangent to the circle AMC , and let AC be a chord drawn from the point of contact A : then will the angle BAC BAC be measured by half of the arc AMC . M D 1 1 I For , draw the diameter AD ...
... measured by half the included , arc . Let BE be tangent to the circle AMC , and let AC be a chord drawn from the point of contact A : then will the angle BAC BAC be measured by half of the arc AMC . M D 1 1 I For , draw the diameter AD ...
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
AB² ABCD AC² 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...