The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago Vitiated These Books, are Corrected, and Some of Euclid's Demonstrations are Restored. Also, The Book of Euclid's Data, in Like Manner Corrected. viz. the first six books, together with the eleventh and twelfthMathew Carey, and sold by J. Conrad & Company, S. F. Bradford, Birch & Small, and Samuel Etheridge. Printed by T. & G. Palmer, 116, High-Street., 1806 - 518 Seiten |
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Seite 85
... segment of a circle are See N. equal to one another . Let ABCD be a circle , and BAD , BED angles in the same segment BAED : the angles BAD , BED are equal to one another . Take F the centre of the circle ABCD : and , first , let the ...
... segment of a circle are See N. equal to one another . Let ABCD be a circle , and BAD , BED angles in the same segment BAED : the angles BAD , BED are equal to one another . Take F the centre of the circle ABCD : and , first , let the ...
Seite 86
... segment BAED be not greater than a semicircle , let BAD , BED be angles in it ; these also are equal to one another : draw AF to the centre , and produce it to C , and join CE : therefore the seg- ment BADC is greater than a semi ...
... segment BAED be not greater than a semicircle , let BAD , BED be angles in it ; these also are equal to one another : draw AF to the centre , and produce it to C , and join CE : therefore the seg- ment BADC is greater than a semi ...
Seite 87
... segments must therefore fall within the other ; let ACB fall within ADB , and draw the straight line BCD , and join CA , DA : and because the segment ACB is similar to the segment ADB , and that similar segments of circles contain equal ...
... segments must therefore fall within the other ; let ACB fall within ADB , and draw the straight line BCD , and join CA , DA : and because the segment ACB is similar to the segment ADB , and that similar segments of circles contain equal ...
Seite 88
... segment AEB must a coincide with the a 23.3 . segment CFD , and therefore is equal to it . Wherefore , similar segments , & c . Q. E. D. PROP . XXV . PROB . See N. a 10. 1 . c 6. 1 . A SEGMENT of a circle being given , to describe the ...
... segment AEB must a coincide with the a 23.3 . segment CFD , and therefore is equal to it . Wherefore , similar segments , & c . Q. E. D. PROP . XXV . PROB . See N. a 10. 1 . c 6. 1 . A SEGMENT of a circle being given , to describe the ...
Seite 89
... segment . Which was to be done . PROP . XXVI . THEOR . IN equal circles , equal angles stand upon equal ... segment BAC is similar to the segment b 11. def . EDF ; d they are upon equal straight lines BC , EF ; but simi- 3 . lar se ...
... segment . Which was to be done . PROP . XXVI . THEOR . IN equal circles , equal angles stand upon equal ... segment BAC is similar to the segment b 11. def . EDF ; d they are upon equal straight lines BC , EF ; but simi- 3 . lar se ...
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altitude angle ABC angle BAC base BC BC is equal BC is given bisected Book XI centre circle ABCD circumference cone cylinder demonstrated described diameter draw drawn equal angles equiangular equimultiples Euclid excess fore given angle given in magnitude given in position given in species given magnitude given point given ratio given straight line gnomon greater join less Let ABC meet multiple opposite parallel parallelogram perpendicular point F polygon prisms proportionals proposition pyramid Q. E. D. PROP radius ratio of AE rectangle CB rectangle contained rectilineal figure right angles segment sides BA similar sine solid angle solid parallelepipeds square of AC straight line AB straight line BC tangent THEOR third triangle ABC triplicate ratio vertex wherefore
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Seite 30 - Any two sides of a triangle are together greater than the third side.
Seite 64 - To divide a given straight line into two parts, so that the rectangle contained by the whole, and one of the parts, may be equal to the square of the other part.
Seite 30 - IF, from the ends of the 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. Let...
Seite 59 - PROP. VIII. THEOR. IF a straight line be divided into any two parts, tour times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.
Seite 28 - If one side of a triangle be produced, the exterior angle is greater than either of the interior opposite angles.
Seite 165 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Seite 19 - THE angles at the base of an isosceles triangle are equal to one another : and, if the equal sides be produced, the angles upon the other side of the base shall be equal.
Seite 191 - In right angled triangles, the rectilineal figure described upon the side opposite to the right angle, is equal to the similar, and similarly described figures upon the sides containing the right angle.
Seite 39 - 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 sidef. 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.
Seite 180 - Therefore, universally, similar rectilineal figures are to one another in the duplicate ratio of their homologous sides.