Scientific and practical geometry for self-instruction1879 |
Inni boken
Resultat 1-5 av 31
Side 20
... mark point b . From 6 , with same length , mark point c , cutting the line xy . From c through b , draw indefinite line cf , and set off bdbc . Then a line , az , drawn from point a through d will be perpendicular to line xy . 2. From ...
... mark point b . From 6 , with same length , mark point c , cutting the line xy . From c through b , draw indefinite line cf , and set off bdbc . Then a line , az , drawn from point a through d will be perpendicular to line xy . 2. From ...
Side 23
... mark the points a and a ' where the line ax would cut the card , and draw a line across the card between those points . Remove the card to point d , and so place it that the line across the card accords with the line ax . A line through ...
... mark the points a and a ' where the line ax would cut the card , and draw a line across the card between those points . Remove the card to point d , and so place it that the line across the card accords with the line ax . A line through ...
Side 24
... mark any point c on that line , and keeping that point fixed , move the line till one end cuts the line db , say at d , then the other end ƒ will mark the point through which the line through a and ƒ will be parallel to ab . Where the ...
... mark any point c on that line , and keeping that point fixed , move the line till one end cuts the line db , say at d , then the other end ƒ will mark the point through which the line through a and ƒ will be parallel to ab . Where the ...
Side 25
... proposed is to convert the angle into a rhombus , and then bisect the angle by a diagonal . On each side of the angle mark with equal lengths ad and af . From d parallel to af draw the indefinite line dx SECTIONS 14 TO 16 . 25.
... proposed is to convert the angle into a rhombus , and then bisect the angle by a diagonal . On each side of the angle mark with equal lengths ad and af . From d parallel to af draw the indefinite line dx SECTIONS 14 TO 16 . 25.
Side 26
... mark the chord and acb the arc . By Sect . 15 bisect the chord ( at d ) , and through d ( Sect . 12 ) draw the perpendicular xy in both directions , and it will bisect the arc ( C , Sect . 37 ) . In this instance ( one of the very few ...
... mark the chord and acb the arc . By Sect . 15 bisect the chord ( at d ) , and through d ( Sect . 12 ) draw the perpendicular xy in both directions , and it will bisect the arc ( C , Sect . 37 ) . In this instance ( one of the very few ...
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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...
Side 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.
Side 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.
Side 96 - Any two sides of a triangle are together greater than the third side.
Side 73 - Parallelograms on the same base, and between the same parallels, are equal to one another.
Side 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.
Side 14 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Side 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.
Side 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.
Side 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.