The first six books of the Elements of Euclid, with numerous exercisesIngram, Cooke, 1853 - 147 σελίδες |
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Αποτελέσματα 6 - 10 από τα 20.
Σελίδα 46
... perpendicular be drawn from the right angle of a right - angled triangle to the hypotenuse , the square of the perpendicular is equal to the rectangle contained by the segments of the hypotenuse 9. If the base of a triangle be bisected ...
... perpendicular be drawn from the right angle of a right - angled triangle to the hypotenuse , the square of the perpendicular is equal to the rectangle contained by the segments of the hypotenuse 9. If the base of a triangle be bisected ...
Σελίδα 47
... perpendicular falls is said to be farther from the centre . Definitions IV . and V. VI . A segment of a circle is the figure contained by a straight line and the circumference it cuts off . Definition VI . VII . The angle of a segment ...
... perpendicular falls is said to be farther from the centre . Definitions IV . and V. VI . A segment of a circle is the figure contained by a straight line and the circumference it cuts off . Definition VI . VII . The angle of a segment ...
Σελίδα 58
... perpendicular to fa , and let it meet the circumference in h ; and because a gd is a right angle , and dag less ( i . 17 ) than a right angle , da is greater ( i . 19 ) than dg . But da is equal to dh ; therefore dh is greater than dg ...
... perpendicular to fa , and let it meet the circumference in h ; and because a gd is a right angle , and dag less ( i . 17 ) than a right angle , da is greater ( i . 19 ) than dg . But da is equal to dh ; therefore dh is greater than dg ...
Σελίδα 60
... perpendicular to the line touching the circle . LET the straight line de touch the circle abc in the point c ; take the centre f , and draw the straight line fc ; fc is perpendicular to de . a For , if it be not , from the point f draw ...
... perpendicular to the line touching the circle . LET the straight line de touch the circle abc in the point c ; take the centre f , and draw the straight line fc ; fc is perpendicular to de . a For , if it be not , from the point f draw ...
Σελίδα 70
... perpendicular to ac ; therefore ag is equal ( iii . 3 ) to gc ; wherefore the rectangle a e , ec , together with the square of eg , is equal ( ii . 5 ) to the square of a g : to each of these equals add the square of gf ; therefore the ...
... perpendicular to ac ; therefore ag is equal ( iii . 3 ) to gc ; wherefore the rectangle a e , ec , together with the square of eg , is equal ( ii . 5 ) to the square of a g : to each of these equals add the square of gf ; therefore the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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 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 ILLUSTRATED LONDON inscribe less LET abc LET the straight likewise multiple opposite angle parallel parallelogram pentagon perpendicular Q. E. D. PROPOSITION rectangle a d rectangle contained remaining angle right angles segment shewn square of a c square of eg straight line a b straight line ab straight line bc tiple touches the circle triangle abc triangle def twice the rectangle
Δημοφιλή αποσπάσματα
Σελίδα 2 - 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 : XVI.
Σελίδα 42 - 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.
Σελίδα 4 - Let it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 21 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Σελίδα 29 - To describe a parallelogram that shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Σελίδα 38 - 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 of...
Σελίδα 15 - 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...
Σελίδα 13 - If one side of a triangle be produced, the exterior angle is greater than either of the interior opposite angles.
Σελίδα 4 - If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Σελίδα 126 - 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.