The Elements of Euclid: In which the Propositions are Demonstrated in a New and Shorter Manner Than in Former Translations, and the Arrangement of Many of Them Altered, to which are Annexed Plain and Spherical Trigonometry, Tables of Logarithms from 1 to 10,000, and Tables of Sines, Tangents, and Secants, Natural and Artificialauthor, and sold, 1776 - 264 sider |
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Side viii
... circumference ; " but the demonftration of the whole is shorter than that prefently used . In the 16th , " the angle of a " femicircle " is omitted , because it follows more naturally as a corollary . The 18th and 19th are joined in one ...
... circumference ; " but the demonftration of the whole is shorter than that prefently used . In the 16th , " the angle of a " femicircle " is omitted , because it follows more naturally as a corollary . The 18th and 19th are joined in one ...
Side 2
... circumference cut off by that diameter . XIX . A fegment of a circle is a figure contained under a right line , and circumference cut off by that right line . XX . Right - lined figures are fuch as are contained by right lines . XXI ...
... circumference cut off by that diameter . XIX . A fegment of a circle is a figure contained under a right line , and circumference cut off by that right line . XX . Right - lined figures are fuch as are contained by right lines . XXI ...
Side 35
... circumference of the circle . VII . Book III . An angle is faid to be in a fegment , when right lines are drawn from fome point in the circumference to the ends of that line which is the base of the fegment , which lines contain the ...
... circumference of the circle . VII . Book III . An angle is faid to be in a fegment , when right lines are drawn from fome point in the circumference to the ends of that line which is the base of the fegment , which lines contain the ...
Side 36
... circumference , then the angle is faid to stand upon that circumference . IX . A fector of a circle is that figure which is contained by two right lines , drawn from the center , and the circumference be- tween them . X. Similar ...
... circumference , then the angle is faid to stand upon that circumference . IX . A fector of a circle is that figure which is contained by two right lines , drawn from the center , and the circumference be- tween them . X. Similar ...
Side 37
... circumference ; therefore the right line AB is within Book III . the circle . Wherefore , & c . COR . Hence , if a right line touches a circle , it will touch it only in one point . PRO P. III . THEO R. IF , in in a circle , a right ...
... circumference ; therefore the right line AB is within Book III . the circle . Wherefore , & c . COR . Hence , if a right line touches a circle , it will touch it only in one point . PRO P. III . THEO R. IF , in in a circle , a right ...
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The Elements of Euclid: In Which the Propositions Are Demonstrated in a New ... Euclid Ingen forhåndsvisning - 2015 |
Almindelige termer og sætninger
ABCM angle ABC angle BAC arch bafe bafe BC baſe becauſe bifected Book XI circle ABCD circle EFGH circumference cofine common fection cone contained cylinder defcribe DEFH diameter draw drawn equal angles equal to AC equiangular equilateral equimultiples fame altitude fame multiple fame plain fame proportion fame reaſon fecond fegment femicircle fhall fides fimilar folid angle folid parallelopipedons fome fore fphere fquare of AC fubtending given right line greater infcribed join lefs leſs likewife magnitudes parallel parallelogram perpendicular plain paffing polygon polyhedron prifms PROP pyramid rectangle right angles right line AB right lined figure Secant Sine Tang tangent thefe THEOR theſe triangle ABC triplicate ratio Wherefore whofe bafe whoſe
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Side 80 - 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.
Side 72 - F, equal to them in number, be taken two and two in the fame ratio, and if their analogy be perturbate, viz. as A is to B, fo is E to F, and B to C as D to E ; and if the firft A be greater than the third C, then the fourth D will be greater than the fixth F ; if equal, equal ; and, if lefs, lefs.
Side 91 - BAC was proved to be equal to ACD : Therefore the whole angle ACE is equal to the two angles ABC, BAC...
Side x - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles, these straight lines being continually produced, shall at length meet upon that side on which are the angles which are less than two right angles.
Side 54 - Let ABC be the given circle, and D the given straight line, not greater than the diameter of the circle. It is required to place in the circle ABC a straight line equal to D.
Side 9 - 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.
Side 13 - From this it is manifest that if one angle of a triangle be equal to the other two it is a right angle, because the angle adjacent to it is equal to the same two ; (i.
Side 69 - Let AB be the fame multiple of C, that DE is of F : C is to F, as AB to DE. Becaufe AB is the fame multiple of C that DE is of F ; there are as many magnitudes in AB equal to C, as there are in...
Side 91 - BGC: for the same reason, whatever multiple the circumference EN is of the circumference EF, the same multiple is the angle EHN of the angle EHF: and if the circumference BL be equal to the circumference EN, the angle BGL is also equal to the angle EHN ; (in.
Side 80 - ... reciprocally proportional, are equal to one another. Let AB, BC be equal parallelograms which have the angles at B equal, and let the sides DB, BE be placed in the same straight line ; wherefore also FB, BG are in one straight line (2.