Plane and Solid Geometry |
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Page 88
... tangents AB and AC are drawn to a given circle O , and a third tangent intersects AB and AC in D and F , Prove ( 1 ) ( 2 ) A AD + DF + AF = 2 AB . A 40 = rt . < B D * Ex . 343. The two common exterior tangents of 88 PLANE GEOMETRY.
... tangents AB and AC are drawn to a given circle O , and a third tangent intersects AB and AC in D and F , Prove ( 1 ) ( 2 ) A AD + DF + AF = 2 AB . A 40 = rt . < B D * Ex . 343. The two common exterior tangents of 88 PLANE GEOMETRY.
Page 89
... tangents of two circles intercept on a common interior tangent a segment , CD , equal to the exterior tangent , AB . E B F MEASUREMENT 203. A ratio of two quantities of the same kind is the quotient obtained by dividing the first ...
... tangents of two circles intercept on a common interior tangent a segment , CD , equal to the exterior tangent , AB . E B F MEASUREMENT 203. A ratio of two quantities of the same kind is the quotient obtained by dividing the first ...
Page 96
... tangent and a chord drawn from the point of contact is measured by half the intercepted arc . D Hyp . A B AB is a tangent , and AC is a chord . CAB is measured by 1⁄2 arc AC . To prove Proof . The Draw the diameter AD . rt . / DAB is ...
... tangent and a chord drawn from the point of contact is measured by half the intercepted arc . D Hyp . A B AB is a tangent , and AC is a chord . CAB is measured by 1⁄2 arc AC . To prove Proof . The Draw the diameter AD . rt . / DAB is ...
Page 97
... tangent be drawn , what angle is formed by the tangent and adjacent side ? Ex . 359. If , in Prop . XV , arc AC = 2 arc CD , find △ CAB . Ex . 360. A chord is parallel to a tangent drawn through the midpoint of the subtended arc ...
... tangent be drawn , what angle is formed by the tangent and adjacent side ? Ex . 359. If , in Prop . XV , arc AC = 2 arc CD , find △ CAB . Ex . 360. A chord is parallel to a tangent drawn through the midpoint of the subtended arc ...
Page 98
... tangents is 60 ° , how many degrees are in each of the intercepted arcs ? Ex . 362. If in the diagram for Case ... tangent is 20 ° and the greater of the intercepted arcs is 90 ° , how many degrees are in the other intercepted arc ...
... tangents is 60 ° , how many degrees are in each of the intercepted arcs ? Ex . 362. If in the diagram for Case ... tangent is 20 ° and the greater of the intercepted arcs is 90 ° , how many degrees are in the other intercepted arc ...
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Common terms and phrases
ABCD altitude angles are equal bisect bisector chord circumference circumscribed cone construct a triangle cylinder diagonals diagram for Prop diameter diedral angles divide draw drawn equiangular equiangular polygon equilateral triangle equivalent exterior angle face angles find a point Find the area Find the radius Find the volume frustum given circle given line given point given triangle Hence HINT homologous hypotenuse inches inscribed intersecting isosceles triangle joining the midpoints lateral area lateral edges line joining mean proportional median opposite sides parallel lines parallelogram parallelopiped perimeter perpendicular plane MN point equidistant polyedral angle polyedron PROPOSITION prove Proof quadrilateral radii ratio rectangle regular polygon respectively equal rhombus right angles right triangle SCHOLIUM segments sphere spherical polygon spherical triangle square straight angle straight line surface tangent THEOREM trapezoid triangle ABC triangle are equal triedral vertex
Popular passages
Page 148 - If two chords intersect within a circle, the product of the segments of one is equal to the product of the segments of the other.
Page 150 - If, from a point without a circle, a tangent and a secant be drawn, the tangent is the mean proportional between the secant and its external segment.
Page 180 - Two triangles having an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles.
Page 45 - If two triangles have two sides of one equal respectively to two sides of the other, but the included angle of the first triangle greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Page 337 - A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles. The bounding arcs are the sides of the polygon ; the...
Page 305 - A cylinder is a solid bounded by a cylindrical surface and two parallel planes ; the bases of a cylinder are the parallel planes; and the lateral surface is the cylindrical surface.
Page 312 - The lateral areas, or the total areas, of similar cylinders of revolution are to each other as the squares of their altitudes, or as the squares of their radii ; and their volumes are to each other as the cubes of their altitudes, or as the cubes of their radii. Let S, S' denote the lateral areas, T, T...
Page 149 - If, from a point without a circle, two secants are drawn, the product of one secant and its external segment is equal to the product of the other and its external segment.
Page 328 - Every section of a sphere made by a plane is a circle.
Page 257 - If two intersecting planes are each perpendicular to a third plane, their intersection is perpendicular to that plane.