Elements of Geometry and Trigonometry: With Notes |
From inside the book
Results 1-5 of 37
Page xii
... shewn nq C = mp C ; hence mp C = mq D ; hence p C = qD . III . The ratio or relation which is perceived to exist be- tween two magnitudes of the same kind , when considered as mere magnitudes , appears to be a simple idea , and ...
... shewn nq C = mp C ; hence mp C = mq D ; hence p C = qD . III . The ratio or relation which is perceived to exist be- tween two magnitudes of the same kind , when considered as mere magnitudes , appears to be a simple idea , and ...
Page 31
... shewn that one circumference can always be made to pass through three given points not in the same straight line : we assert farther , that but one can be described through them . For , if there were a second circumference passing ...
... shewn that one circumference can always be made to pass through three given points not in the same straight line : we assert farther , that but one can be described through them . For , if there were a second circumference passing ...
Page 33
... shewn , we shall have MH = HP , MK = KP ; and hence the whole arc HMK = HPK . It is far- ther evident that each of these arcs is a semicircumference . THEOREM . 113. If two circles cut each other in two points , the line which passes ...
... shewn , we shall have MH = HP , MK = KP ; and hence the whole arc HMK = HPK . It is far- ther evident that each of these arcs is a semicircumference . THEOREM . 113. If two circles cut each other in two points , the line which passes ...
Page 35
... shewn , we shall have AI - DE : but , by hypothesis , AB is equal to DE ; hence AI must be equal to AB , or a part , to the whole , which is absurd : hence the angle ACB is equal to DCE . THEOREM . 120. In the same circle , or in BOOK ...
... shewn , we shall have AI - DE : but , by hypothesis , AB is equal to DE ; hence AI must be equal to AB , or a part , to the whole , which is absurd : hence the angle ACB is equal to DCE . THEOREM . 120. In the same circle , or in BOOK ...
Page 37
... shewn that the fourth term of the proportion cannot be less than AD ; hence it is AD itself ; therefore we have Angle ACB : angle ACD :: arc AB : arc AD . 123. Cor . Since the angle at the centre of a circle , and the arc intercepted by ...
... shewn that the fourth term of the proportion cannot be less than AD ; hence it is AD itself ; therefore we have Angle ACB : angle ACD :: arc AB : arc AD . 123. Cor . Since the angle at the centre of a circle , and the arc intercepted by ...
Other editions - View all
Common terms and phrases
adjacent angles altitude angle ACB angle BAC bisect centre chord circ circle circular sector circumference circumscribed common cone construction continued fraction convex surface cosines cylinder diagonals diameter draw drawn equal angles equation equivalent figure formed formulas frustum given angle given line gles greater homologous sides hypotenuse inclination inscribed intersection isosceles less Let ABC let fall likewise measure multiplied number of sides oblique lines opposite parallel parallelogram parallelopipedon pendicular perimeter perpendicular plane MN polyedron prism proposition quadrilateral quantities radii radius ratio rectangle regular polygon respectively equal right angles right-angled triangle SABC Scholium sector segment semicircumference shewn similar sines solid angle solid described sphere spherical polygons spherical triangle square straight line suppose tang tangent THEOREM third side three angles trian triangle ABC triangular prism triangular pyramids vertex vertices
Popular passages
Page 74 - Two similar polygons are composed of the same number of triangles, similar each to each, and similarly situated.
Page 26 - CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
Page 176 - The radius of a sphere is a straight line, drawn from the centre to any point of the surface ; the diameter, or axis, is a line passing through this centre, and terminated on both sides by the surface.
Page 243 - If two angles of one triangle are equal to two angles of another triangle, the third angles are equal, and the triangles are mutually equiangular.
Page 58 - Two triangles of the same altitude are to each other as their bases, and two triangles of the same base are to each other as their altitudes. And triangles generally, are to each other, as the products of their bases and altitudes.
Page ii - District, has deposited in this office the title of a book, the right whereof he claims as proprietor, in the words following, to wit : " THE CHILD'S BOTANY," In conformity to the act of the Congress of the United States, entitled, " An act for the encouragement of learning by securing the copies of maps, charts, and books to the authors and proprietors of such copies, during the times therein mentioned...
Page 280 - In every plane triangle, the sum of two sides is to their difference as the tangent of half the sum of the angles opposite those sides is to the tangent of half their difference.
Page 126 - If one of two parallel lines is perpendicular to a plane, the other will also be perpendicular to the same plane.
Page 28 - THEOREM. A straight line cannot meet the circumference of a circle in more than two points.
Page 161 - ... bases simply : hence two prisms of the same altitude are to each other as their bases. For a like reason, two prisms of the same base are to each other as their altitudes.