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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Σελίδα 10
... definition ( which is the most common one ) may be admitted as expressing such a first conception ; but since we can ... Definitions . Geometry may be defined as the science 10 GEOMETRY .
... definition ( which is the most common one ) may be admitted as expressing such a first conception ; but since we can ... Definitions . Geometry may be defined as the science 10 GEOMETRY .
Σελίδα 11
... Definitions . Geometry may be defined as the science of extension and position . More specifically , it is the science which treats of the construction of figures under given conditions , of their measurement , and of their properties ...
... Definitions . Geometry may be defined as the science of extension and position . More specifically , it is the science which treats of the construction of figures under given conditions , of their measurement , and of their properties ...
Σελίδα 13
... Definition . An angle is a figure formed by two straight lines drawn from the same point ; thus OA , OB form an angle at 0. The lines ÓA , OB are called the sides of the angle ; the common point O , its vertex . B B An isolated angle ...
... Definition . An angle is a figure formed by two straight lines drawn from the same point ; thus OA , OB form an angle at 0. The lines ÓA , OB are called the sides of the angle ; the common point O , its vertex . B B An isolated angle ...
Σελίδα 14
... Definition . When one straight line meets another , so as to make two adjacent angles equal , each of these angles is called a right angle ; and the first line is said to be perpendicular to the second . Thus , if AOC and BOC are equal ...
... Definition . When one straight line meets another , so as to make two adjacent angles equal , each of these angles is called a right angle ; and the first line is said to be perpendicular to the second . Thus , if AOC and BOC are equal ...
Σελίδα 15
... definition ( 8 ) , and no proof is necessary . C If they are not equal , as AOD and BOD , still the sum of AOD and BOD is equal to two right angles . For , let OC be drawn at O perpendicular to AB . The angle AOD is the sum of the two ...
... definition ( 8 ) , and no proof is necessary . C If they are not equal , as AOD and BOD , still the sum of AOD and BOD is equal to two right angles . For , let OC be drawn at O perpendicular to AB . The angle AOD is the sum of the two ...
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.