Scientific and practical geometry for self-instruction1879 |
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Σελίδα 9
... axes of unequal length instead of the equal radii of a circle ( see B , Fig . 49 to 51 , and Sectns . 64 , & c . , of ... axis at the broader end is shorter , and at the narrower end is longer ( B , Fig . 51 , and Sectns . 67 , & c .; F ...
... axes of unequal length instead of the equal radii of a circle ( see B , Fig . 49 to 51 , and Sectns . 64 , & c . , of ... axis at the broader end is shorter , and at the narrower end is longer ( B , Fig . 51 , and Sectns . 67 , & c .; F ...
Σελίδα 47
... axis and minor or conjugate axis being 8 to 6 ; but should an ellipse with different proportions be required No. 1 will not be applicable . No. 2 is what is called the " Gardener's Ellipse , ” being the mode adopted in drawing an ...
... axis and minor or conjugate axis being 8 to 6 ; but should an ellipse with different proportions be required No. 1 will not be applicable . No. 2 is what is called the " Gardener's Ellipse , ” being the mode adopted in drawing an ...
Σελίδα 48
... axis . The intersection of the arcs marks points through which the curve of the ellipse passes . No. 4. The Builder's Ellipse is a mode by which in prac- tice a very satisfactory ellipse or elliptical arch may be drawn . Several other ...
... axis . The intersection of the arcs marks points through which the curve of the ellipse passes . No. 4. The Builder's Ellipse is a mode by which in prac- tice a very satisfactory ellipse or elliptical arch may be drawn . Several other ...
Σελίδα 49
... axis and cd the minor axis , and g and h the foci as in No. 2 . For convenience in making the pairs of radii drawing the cross arcs together equal to ab , draw separately the length ab . Divide ab into any unequal segments ( 1 , 2 , and ...
... axis and cd the minor axis , and g and h the foci as in No. 2 . For convenience in making the pairs of radii drawing the cross arcs together equal to ab , draw separately the length ab . Divide ab into any unequal segments ( 1 , 2 , and ...
Σελίδα 50
... axis , and ac the semi - minor axis , the part of the figure on the other side of the line ca being drawn to explain the distinction between an ellipse and an oval in Sect . 67 post . Complete the rectangle acdb and divide the sides cd ...
... axis , and ac the semi - minor axis , the part of the figure on the other side of the line ca being drawn to explain the distinction between an ellipse and an oval in Sect . 67 post . Complete the rectangle acdb and divide the sides cd ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ab² abcd ac² adjacent angles altitude angles equal angles Sect Application axis bisected centre chord circle circumference consequently construction continued contour corresponding angles cutting deduction demonstration diagonal diameter distance divided division draw arc draw line draw the indefinite drawn ellipse equal angles equal bases equal Sect equal sides equidistant equivalent triangle Euclid example exterior angle external angle four right angles frustrum geometrical operations give greater hypothenuse inches included angle indefinite line isosceles triangle length Let abc let fall line ac line cd mark measure half mode Multiply number of sides oblique opposed angle parallel ruler parallelogram pendicular polygons proof proposition radii ratio rectangle reflex angle rhombus right line rule in Sect secant Sectns segment semicircle set square side ab side ac similar triangles slant height summit supplementary angles tangent third side trapezium triangle abc
Δημοφιλή αποσπάσματα
Σελίδα 14 - 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...
Σελίδα 8 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 7 - A circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the center, Fig.
Σελίδα 96 - Any two sides of a triangle are together greater than the third side.
Σελίδα 73 - Parallelograms on the same base, and between the same parallels, are equal to one another.
Σελίδα 278 - Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 14 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Σελίδα 266 - A sphere is a solid, bounded by a curved surface, every part of which is equally distant from a point within, called the centre.
Σελίδα 45 - From a given point without a line, to draw a perpendicular to that line. Let AB be the given line, and C the given point. From C draw any oblique line, as Cn.
Σελίδα 9 - The sign, + , which is read plus, indicates that the numbers between which it is placed are to be added ; thus, 6 + 4, means, that 4 is to be added to 6.