The Elements of EuclidLongmans, Green and Company, 1866 - 376 páginas |
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Página 2
... angles are at one point B , any one of them is expressed by three letters , of which the letter that is at the ... right angle ; and the straight line which stands on the other is called a perpendicular to it . XI . An obtuse angle is that ...
... angles are at one point B , any one of them is expressed by three letters , of which the letter that is at the ... right angle ; and the straight line which stands on the other is called a perpendicular to it . XI . An obtuse angle is that ...
Página 5
... right angles are equal to one another . XII . If a straight line falls upon two straight lines , so as to make the two interior angles on the same side of it together less than two right angles , these straight lines , being continually ...
... right angles are equal to one another . XII . If a straight line falls upon two straight lines , so as to make the two interior angles on the same side of it together less than two right angles , these straight lines , being continually ...
Página 14
... right angles to a given straight line from a given point in the same . Let AB be the given straight line , and C a given point in it it is required to draw from the point C a straight line at right angles to AB . Take any point D in AC ...
... right angles to a given straight line from a given point in the same . Let AB be the given straight line , and C a given point in it it is required to draw from the point C a straight line at right angles to AB . Take any point D in AC ...
Página 15
... angle DCF is equal to the angle ECF ; and they are adjacent angles : But , when a straight line , standing on another straight line , makes the adjacent angles equal to one another , each of these angles is called a right angle ( Def ...
... angle DCF is equal to the angle ECF ; and they are adjacent angles : But , when a straight line , standing on another straight line , makes the adjacent angles equal to one another , each of these angles is called a right angle ( Def ...
Página 16
... angle CHF is equal to the angle CHG , and they are adjacent angles : But when a straight line , standing on another straight line , makes the adjacent angles equal to one another , each of these angles is called a right angle ; and the ...
... angle CHF is equal to the angle CHG , and they are adjacent angles : But when a straight line , standing on another straight line , makes the adjacent angles equal to one another , each of these angles is called a right angle ; and the ...
Términos y frases comunes
AB² ABCD AC² AD² adjacent angles angle ABC angle ACB angle BAC angle equal base BC BC is equal centre chord circle ABC circumference diameter double draw equal angles equal to F equiangular equilateral triangle equimultiples exterior angle fore given circle given line given point given rectilineal given straight line gnomon hypotenuse inscribed intersection isosceles triangle join less Let ABC lines be drawn lines drawn meet multiple opposite angles parallel to BC parallelogram perpendicular plane polygon PROB produced proportionals Q. E. D. PROP rectangle contained rectilineal figure remaining angle right angles segment semicircle shew shewn square on AC tangents THEOR touches the circle triangle ABC twice the rectangle vertex Wherefore