The Elements of geometry; or, The first six books, with the eleventh and twelfth, of Euclid, with corrections, annotations, and exercises, by R. Wallace. Cassell's ed |
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An acute angle is that which is less than a right angle . The term oblique angles is applied both to obtuse angles and to acute angles . XIII . [ A term or boundary is the extremity of any thing . ] ...
An acute angle is that which is less than a right angle . The term oblique angles is applied both to obtuse angles and to acute angles . XIII . [ A term or boundary is the extremity of any thing . ] ...
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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 ...
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 ...
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D с A. E B F From the greater of two given straight lines to cut off a part equal to the less . Let AB and C be the two given straight lines , of which AB is the greater . It is required to cut off from AB , the greater , a part equal ...
D с A. E B F From the greater of two given straight lines to cut off a part equal to the less . Let AB and C be the two given straight lines , of which AB is the greater . It is required to cut off from AB , the greater , a part equal ...
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In BD take any point F , and from A E the greater , cut off AG equal ( I. 3 ) to AF the less . Join FC , GB . Because in the two triangles AFC , AGB , AF is equal to ( Const . ) AG , and AB to ( Hyp . ) AC , the two sides FA , AC are ...
In BD take any point F , and from A E the greater , cut off AG equal ( I. 3 ) to AF the less . Join FC , GB . Because in the two triangles AFC , AGB , AF is equal to ( Const . ) AG , and AB to ( Hyp . ) AC , the two sides FA , AC are ...
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For , if AB be not equal to AC , one of them is greater than the other Let AB be the grea ; and from B A cut ( 1..3 ) off BD equal to AC , the less . And join DC . Because in the two triangles DBC , ACB , the side DB is equal to the ...
For , if AB be not equal to AC , one of them is greater than the other Let AB be the grea ; and from B A cut ( 1..3 ) off BD equal to AC , the less . And join DC . Because in the two triangles DBC , ACB , the side DB is equal to the ...
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The Elements of Geometry: Or, the First Six Books, with the Eleventh and ... Euclides Keine Leseprobe verfügbar - 2016 |
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ABCD altitude angle BAC base bisected Book centre circle circle ABC circumference common compounded cone Const contained Corollary cylinder definition demonstration described diagonal diameter divided double draw equal angles equiangular equimultiples Exercise exterior angle extremities fore four fourth given straight line greater half homologous inscribed interior join less magnitudes manner meet multiple parallel parallelogram parallelopiped pass perpendicular plane polygon prism PROBLEM produced PROP proportionals proposition proved pyramid ratio reason rectangle rectangle contained rectilineal figure remaining angle right angles segment shown sides similar similarly solid solid angle sphere square straight line A B Take taken THEOREM third touch triangle A B C twice vertex Wherefore whole
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Seite 23 - 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.
Seite 34 - 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 line.
Seite 2 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Seite 122 - 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 5 - LET it be granted that a straight line may be drawn from any one point to any other point.
Seite 3 - A circle is a 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.
Seite 135 - Two triangles, which have an angle of the one equal to an angle of the other, and the sides containing those angles proportional, are similar.
Seite 20 - PROBLEM. At a given point in a given straight line, to make a rectilineal angle equal to a given rectilineal angle.
Seite 147 - Similar solid figures are such as have all their solid angles equal, each to each, and are contained by the same number of similar planes.
Seite 37 - 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, together with the square...