The first six books of the Elements of Euclid, with numerous exercisesIngram, Cooke, 1853 - 147 σελίδες |
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Αποτελέσματα 1 - 5 από τα 64.
Σελίδα 2
... angle at a point , it may be expressed by a letter placed at that point ; as the angle at e . X. 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 at a point , it may be expressed by a letter placed at that point ; as the angle at e . X. 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 ...
Σελίδα 3
... right - angled triangle is that which has a right angle . XXVIII . An obtuse - angled triangle is that which has an obtuse angle . Right - angled .. Obtuse - angled . Acute - angled . XXIX . An acute - angled triangle is that which has ...
... right - angled triangle is that which has a right angle . XXVIII . An obtuse - angled triangle is that which has an obtuse angle . Right - angled .. Obtuse - angled . Acute - angled . XXIX . An acute - angled triangle is that which has ...
Σελίδα 4
... right angles are equal to one another . XII . 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 ...
... right angles are equal to one another . XII . 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 ...
Σελίδα 10
... angles . But , when the adjacent angles which one straight line makes with another straight line are equal to one another , each of them is called a right angle ( 10 def . ) ; therefore each of the angles dcf , ecf , is a right angle ...
... angles . But , when the adjacent angles which one straight line makes with another straight line are equal to one another , each of them is called a right angle ( 10 def . ) ; therefore each of the angles dcf , ecf , is a right angle ...
Σελίδα 11
... right angle ; and the straight line which stands upon the other is called a perpendicular to it ; therefore from the ... angles ( i . 11 ) to cd ; therefore the angles cbe , ebd are two right angles ( 10 def . ) ; and because cbe is ...
... right angle ; and the straight line which stands upon the other is called a perpendicular to it ; therefore from the ... angles ( i . 11 ) to cd ; therefore the angles cbe , ebd are two right angles ( 10 def . ) ; and because cbe is ...
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a b c abcd adjacent angles angle a cb angle abc angle bac angle edf angle equal base bc bc is equal bisected centre circle abc circumference bc describe diameter double draw equal angles equal straight lines equal to f equimultiples ex æquali exterior angle fore four magnitudes fourth given circle given straight line gnomon greater ratio greater than f inscribe less LET abc LET the straight likewise multiple opposite angle parallel parallelogram perpendicular produced Q. E. D. PROPOSITION rectangle a d rectangle contained remaining angle right angles segment semicircle shewn square of a c straight line a b straight line ab straight line bc tiple touches the circle triangle abc triangle def twice the rectangle