A Treatise on Elementary Geometry: With Appendices Containing a Collection of Exercises for Students and an Introduction to Modern GeomentryJ.B. Lippincott & Company, 1871 - 368 σελίδες |
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Αποτελέσματα 1 - 5 από τα 39.
Σελίδα 13
... fixed side a varying angle , which increases by insensible degrees , that is , continuously ; and the revolving line is * An Arabic numeral alone refers to an article in the same Book ; but in refer- ring to articles in another Book ...
... fixed side a varying angle , which increases by insensible degrees , that is , continuously ; and the revolving line is * An Arabic numeral alone refers to an article in the same Book ; but in refer- ring to articles in another Book ...
Σελίδα 18
... fixed during the revolution , the point Cis fixed ; therefore PC will coincide with P'C , and the angle PCD with the angle P'CD . These angles are therefore equal ( 6 ) , and BC is perpendicular to PP ' ( 8 ) , or PC perpendicular to AB ...
... fixed during the revolution , the point Cis fixed ; therefore PC will coincide with P'C , and the angle PCD with the angle P'CD . These angles are therefore equal ( 6 ) , and BC is perpendicular to PP ' ( 8 ) , or PC perpendicular to AB ...
Σελίδα 19
... fixed , PD coincides with P'D , and consequently the angle PDC with the angle P'DC . Hence the angles PDC and P'DC are equal . Now PP ' being the only straight line that can be drawn from P to P ' ( 1 ) , PDP ' is not a straight line ...
... fixed , PD coincides with P'D , and consequently the angle PDC with the angle P'DC . Hence the angles PDC and P'DC are equal . Now PP ' being the only straight line that can be drawn from P to P ' ( 1 ) , PDP ' is not a straight line ...
Σελίδα 32
... fixed point , HD will fall upon its equal HG , and the triangle DEF will coincide entirely with the triangle GEF . Therefore , the tri- angle DEF is equal to the triangle GEF , or to the triangle ABC . H E B D 81. Corollary . If in two ...
... fixed point , HD will fall upon its equal HG , and the triangle DEF will coincide entirely with the triangle GEF . Therefore , the tri- angle DEF is equal to the triangle GEF , or to the triangle ABC . H E B D 81. Corollary . If in two ...
Σελίδα 48
... fixed straight line , called the axis of symmetry , when this axis bisects at right angles the straight line joining the two points . Thus , A and A ' are symmetrical with respect to the axis MN , if MN bisects AA ' at right angles at a ...
... fixed straight line , called the axis of symmetry , when this axis bisects at right angles the straight line joining the two points . Thus , A and A ' are symmetrical with respect to the axis MN , if MN bisects AA ' at right angles at a ...
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 adjacent angles altitude apothem base bisects centre of similitude chord circumference circumscribed coincide common cone construct 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 indefinitely inscribed inscribed angle isosceles Let ABC measure 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 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 115 - X PB'; that is, if through a fixed point without a circle a tangent to the circle is drawn, and also any secant, the tangent is a mean proportional between the whole secant and its external segment.
Σελίδα 46 - The three perpendiculars from the vertices of a triangle to the opposite sides meet in the same point.
Σελίδα 127 - The areas of two rectangles are to each other as the products of their bases by their altitudes.
Σελίδα 129 - The area of a parallelogram is equal to the product of its base and altitude. Let...
Σελίδα 117 - The sum of the squares of the sides of any quadrilateral is equal to the sum of the squares of the diagonals plus four times the square of the line joining the middle points of the diagonals.
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 261 - Any side of a spherical triangle is less than the sum of the other two.
Σελίδα 95 - If four quantities are in proportion, they are in proportion by composition, ie the sum of the first two terms is to the second term as the sum of the last two terms is to the fourth term.
Σελίδα 132 - 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.