A Treatise on Elementary Geometry: With Appendices Containing a Collection of Exercises for Students and an Introduction to Modern GeometryJ.B. Lippincott, 1872 - 368 σελίδες |
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Σελίδα 49
... radius of symmetry . A point A is brought into coincidence with its symmetrical point A ' , by revolving its radius OA through two right angles in its own plane ( 16 ) . 139. Definition . Any two figures are symmetrical with respect to ...
... radius of symmetry . A point A is brought into coincidence with its symmetrical point A ' , by revolving its radius OA through two right angles in its own plane ( 16 ) . 139. Definition . Any two figures are symmetrical with respect to ...
Σελίδα 50
... radius of symmetry revolving through two right angles at the same time . 140. Definition . Any single figure is called a symmetrical figure , either when it can be divided by an axis into two figures symmetri- cal with respect to that ...
... radius of symmetry revolving through two right angles at the same time . 140. Definition . Any single figure is called a symmetrical figure , either when it can be divided by an axis into two figures symmetri- cal with respect to that ...
Σελίδα 52
... radius . Any straight line drawn through the centre and terminated each way by the circumfer- ence is called a diameter . с B In the figure , O is the centre , and the curve ABCEA is the cir- cumference of the circle ; the circle is the ...
... radius . Any straight line drawn through the centre and terminated each way by the circumfer- ence is called a diameter . с B In the figure , O is the centre , and the curve ABCEA is the cir- cumference of the circle ; the circle is the ...
Σελίδα 53
... radius ; and every point without the circle is at a distance from the centre which is greater than the radius . Hence ( I. 40 ) , the locus of all the points in a plane which are at a given distance from a given point is the ...
... radius ; and every point without the circle is at a distance from the centre which is greater than the radius . Hence ( I. 40 ) , the locus of all the points in a plane which are at a given distance from a given point is the ...
Σελίδα 58
... radius equal to any one of the three equal distances OA , OB , OC , will pass through the three given points . 2d . Only one circumference can be made to pass through these points . For the centre of any circumference passing through ...
... radius equal to any one of the three equal distances OA , OB , OC , will pass through the three given points . 2d . Only one circumference can be made to pass through these points . For the centre of any circumference passing through ...
Άλλες εκδόσεις - Προβολή όλων
A Treatise on Elementary Geometry: With Appendices Containing a Collection ... William Chauvenet Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
A Treatise on Elementary Geometry: With Appendices Containing a Collection ... William Chauvenet Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC² adjacent angles altitude apothem base bisects centre of similitude chord circumference circumscribed coincide common cone Corollary cylinder Definition denote diagonals diameter dicular diedral angle distance divided draw edges equally distant equilateral equivalent exterior angle faces figure find the locus frustum given circles given plane given point given straight line hence homologous hypotenuse indefinitely inscribed angle isosceles Let ABC measure medial lines middle point number of sides one-half opposite sides parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN plane passed polar pole polyedral angle polyedron prism PROPOSITION pyramid quadrilateral radical axis radii radius rectangle regular polygon respectively right angles right triangle Scholium secant segment similar sphere spherical polygon square straight line drawn straight line joining surface symmetrical tangent tetraedron theorem three given triangle ABC triedral vertex vertices volume
Δημοφιλή αποσπάσματα
Σελίδα 128 - The area of a rectangle is equal to the product of its base and altitude.
Σελίδα 348 - Three lines are in harmonical proportion, when the first is to the third, as the difference between the first and second, is to the difference between the second and third ; and the second is called a harmonic mean between the first and third. The expression 'harmonical proportion...
Σελίδα 19 - The perpendicular is the shortest line that can be drawn from a point to a straight line.
Σελίδα 79 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line ; it is required to draw a straight line through the point A, parallel to the straight hue BC.
Σελίδα 29 - The sum of the three angles of any triangle is equal to two right angles.
Σελίδα 175 - If a straight line is perpendicular to each of two straight lines at' their point of intersection, it is perpendicular to the plane of those lines.
Σελίδα 263 - The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC...
Σελίδα 219 - A truncated triangular prism is equivalent to the sum of three pyramids, whose common base is the base of the prism and whose vertices are the three vertices of the inclined section.
Σελίδα 197 - A right prism is a prism •whose lateral edges are perpendicular to the planes of the bases.
Σελίδα 127 - Any two rectangles are to each other as the products of their bases by their altitudes. Let R and R...