Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with Appendix by Thos. Kirkland. the first six booksA. Miller & Company, 1876 - 403 σελίδες |
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Σελίδα
... Plane Geometry unnecessary in our course of Mathematics . " For the very favourable reception which both Editions have met with , the Editor's grateful acknowledgements are due . It has been his desire in putting forth a revised Edition ...
... Plane Geometry unnecessary in our course of Mathematics . " For the very favourable reception which both Editions have met with , the Editor's grateful acknowledgements are due . It has been his desire in putting forth a revised Edition ...
Σελίδα 1
... plane superficies is that in which any two points being taken , the straight line between them lies wholly in that superficies . VIII . A plane angle is the inclination of two lines to each other in a plane , which meet together , but ...
... plane superficies is that in which any two points being taken , the straight line between them lies wholly in that superficies . VIII . A plane angle is the inclination of two lines to each other in a plane , which meet together , but ...
Σελίδα 2
... is that which is less than a right angle . XIII . A term or boundary 18 the extremity of any thing . XIV . A figure is that which is enclosed by one or more boundaries . XV . A circle is a plane figure contained by 2 EUCLID'S ELEMENTS .
... is that which is less than a right angle . XIII . A term or boundary 18 the extremity of any thing . XIV . A figure is that which is enclosed by one or more boundaries . XV . A circle is a plane figure contained by 2 EUCLID'S ELEMENTS .
Σελίδα 3
... plane figure contained by one line , which is called the circumference , and is such that all straight lines drawn from a certain point within the figure to the circumference , are equal to one another . XVI . And this point is called ...
... plane figure contained by one line , which is called the circumference , and is such that all straight lines drawn from a certain point within the figure to the circumference , are equal to one another . XVI . And this point is called ...
Σελίδα 5
... plane , and which being produced ever so far both ways , do not meet . A. A parallelogram is a four - sided figure , of which the opposite sides are parallel : and the diameter , or the diagonal is the straight line joining two of its ...
... plane , and which being produced ever so far both ways , do not meet . A. A parallelogram is a four - sided figure , of which the opposite sides are parallel : and the diameter , or the diagonal is the straight line joining two of its ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
A₁ ABCD AC is equal Algebraically angle ABC angle ACB angle BAC angle equal Apply Euc base BC chord circle ABC constr describe a circle diagonals diameter divided draw equal angles equiangular equilateral triangle equimultiples Euclid exterior angle Geometrical given circle given line given point given straight line gnomon greater hypotenuse inscribed intersection isosceles triangle less Let ABC line BC lines be drawn multiple opposite angles parallelogram parallelopiped pentagon perpendicular plane polygon produced Prop proportionals proved Q.E.D. PROPOSITION quadrilateral quadrilateral figure radius ratio rectangle contained rectilineal figure remaining angle right angles right-angled triangle segment semicircle shew shewn similar similar triangles solid angle square on AC tangent THEOREM touch the circle triangle ABC twice the rectangle vertex vertical angle wherefore
Δημοφιλή αποσπάσματα
Σελίδα 93 - If a straight line be bisected and produced to any point, the square on the whole line thus produced, and the square on the part of it produced, are together double of the square on half the line bisected, and of the square on the line made up of the half and the part produced. Let the straight line AB be bisected in C, and produced to D ; The squares on AD and DB shall be together double of the squares on AC and CD. CONSTRUCTION. — From the point C draw CE at right angles to AB, and make it equal...
Σελίδα 118 - Guido, with a burnt stick in his hand, demonstrating on the smooth paving-stones of the path, that the square on the hypotenuse of a right-angled triangle is equal to the sum of the squares on the other two sides.
Σελίδα 145 - If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle ; the angles which this line makes with the line touching the circle, shall be equal to the angles which are in the alternate segments of the circle.
Σελίδα 88 - If a straight line be divided into two equal parts and also into two unequal parts, the rectangle contained by the unequal parts, together with the square on the line between the points of section, is equal to the square on half the line.
Σελίδα 26 - ... upon the same side together equal to two right angles, the two straight lines shall be parallel to one another.
Σελίδα 36 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Σελίδα 144 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 92 - If a straight line be divided into two equal, and also into two unequal parts, the squares on the two unequal parts are together double of the square on half the line and of the square on the line between the points of section. Let the straight line AB be divided into two equal parts...
Σελίδα xv - In every triangle, the square of the side subtending either of the acute angles is less than the squares of the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle.
Σελίδα 67 - A proposition affirming the possibility of finding such conditions as will render a certain problem indeterminate or capable of innumerable solutions.