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 8.
Σελίδα 49
AF is the rectangle contained by BA , AC , for it is contained by DA , AC , of which AD is equal ( Def . ... square of the whole line is equal to the squares of the two parts , together with twice the rectangle contained by the parts .
AF is the rectangle contained by BA , AC , for it is contained by DA , AC , of which AD is equal ( Def . ... square of the whole line is equal to the squares of the two parts , together with twice the rectangle contained by the parts .
Σελίδα 50
Let the straight line AB be divided into any two parts in C ; the square of AB is equal to the squares of AC , CB , together with twice the rectangle contained by AC , CB . H G K D F E Upon AB describe ( I. 46. ) ...
Let the straight line AB be divided into any two parts in C ; the square of AB is equal to the squares of AC , CB , together with twice the rectangle contained by AC , CB . H G K D F E Upon AB describe ( I. 46. ) ...
Σελίδα 51
to CB ; therefore also GE is equal to the rectangle AC , CB ; 13 . wherefore 14. AG , GE , are equal to twice the rectangle AC , CB : and HF , CK , are the squares of AC , CB ; wherefore 15. The four figures HF , CK , AG , GE , are ...
to CB ; therefore also GE is equal to the rectangle AC , CB ; 13 . wherefore 14. AG , GE , are equal to twice the rectangle AC , CB : and HF , CK , are the squares of AC , CB ; wherefore 15. The four figures HF , CK , AG , GE , are ...
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 . but Let the ...
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 . but Let the ...
Σελίδα 54
The squares of AB and BC are equal to twice the rectangle AB , BC , together with the square of AC . Wherefore , if a straight line , & c . Q.E.D. PROP . VIII . — THEOREM . If a straight line be divided into any two parts , four times ...
The squares of AB and BC are equal to twice the rectangle AB , BC , together with the square of AC . Wherefore , if a straight line , & c . Q.E.D. PROP . VIII . — THEOREM . If a straight line be divided into any two parts , four times ...
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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...