The synoptical Euclid; being the first four books of Euclid's Elements of geometry, with exercises, by S.A. Good |
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Αποτελέσματα 1 - 5 από τα 19.
Σελίδα 14
The two sides AC , CD are equal to BC , CD , each to each ; and ( Constr . ) 2. The angle ACD is equal to the angle BCD ; therefore ( I. 4. ) wherefore 4. The straight line AB is divided into two ...
The two sides AC , CD are equal to BC , CD , each to each ; and ( Constr . ) 2. The angle ACD is equal to the angle BCD ; therefore ( I. 4. ) wherefore 4. The straight line AB is divided into two ...
Σελίδα 32
D E F Q.E.D. C B For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides , by drawing straight lines from a point F within the figure to each of its angles . And by the preceding proposition ...
D E F Q.E.D. C B For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides , by drawing straight lines from a point F within the figure to each of its angles . And by the preceding proposition ...
Σελίδα 47
If there be two straight lines , one of which is divided into any number of parts , the rectangle contained by the two straight lines , is equal to the rectangles contained by the undivided line , and the several parts of the divided ...
If there be two straight lines , one of which is divided into any number of parts , the rectangle contained by the two straight lines , is equal to the rectangles contained by the undivided line , and the several parts of the divided ...
Σελίδα 48
If a straight line be divided into any two parts , the rectangles contained by the whole and each of the parts are together equal to the square of the whole line . Let the straight line AB be divided into any two parts in the point C ...
If a straight line be divided into any two parts , the rectangles contained by the whole and each of the parts are together equal to the square of the whole line . Let the straight line AB be divided into any two parts in the point C ...
Σελίδα 49
If a straight line be divided into any two parts , the rectangle contained by the whole and one of the parts is equal to the rectangle contained by the two parts , together with the square of the aforesaid part .
If a straight line be divided into any two parts , the rectangle contained by the whole and one of the parts is equal to the rectangle contained by the two parts , together with the square of the aforesaid part .
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ABCD AC is equal AF is equal angle ABC angle ACB angle BAC angle BCD angle equal base BC bisected centre circle ABC circumference coincide common demonstrated describe diameter distance divided double draw equal angles equal Constr exterior angle extremity fall figure four given circle given point given straight line given triangle greater impossible inscribed join less Let ABC likewise manner meet opposite angles parallel parallelogram pass pentagon perpendicular point F produced Q.E.D. PROP reason rectangle contained rectilineal figure remaining angle required to describe right angles segment semicircle shown side BC sides square of AC straight line AC touches the circle triangle ABC twice the rectangle wherefore whole
Δημοφιλή αποσπάσματα
Σελίδα 26 - If two triangles have two angles of the one equal to two angles of the other, each to each ; and one side equal to one side, viz. either the sides adjacent to the equal...
Σελίδα 22 - If from the ends of a side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than the other two sides of the triangle, but shall contain a greater angle.
Σελίδα 32 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 1 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies. vm. "A plane angle is the inclination of two lines to one another in a plane, which meet together, but are not in the same direction.
Σελίδα 97 - If from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, shall be equal to the square of the line which touches it.
Σελίδα 7 - AB; but things which are equal to the same are equal to one another...
Σελίδα 14 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line : it is required to divide it intotwo equal parts.
Σελίδα 53 - IF a straight line be divided into any two parts, the squares of the whole line, and of one of the parts, are equal to twice the rectangle contained by the whole and that part, together with the square of the other part.
Σελίδα 41 - 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 52 - If a straight line be bisected, and produced to any point; the rectangle contained by the whole line thus produced, and the part of it produced...