Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 27.
Σελίδα 8
... Tangent to a circle or any other curve is a right line which touches it , but only at one point ( mn ) . Secant , a line which cuts a circumference ( Fig . D 23 , ag , af , & c . ) Inscribed Figures , those in which the sides form ...
... Tangent to a circle or any other curve is a right line which touches it , but only at one point ( mn ) . Secant , a line which cuts a circumference ( Fig . D 23 , ag , af , & c . ) Inscribed Figures , those in which the sides form ...
Σελίδα 28
... tangent , of the arc , but the length is not material ) . From g or d draw a perpendicular af or dh . Through point a draw any line ( ai ) , and set off al = cg , or ai = cd , and draw the indefinite perpendicular ly or ix . - Set off ...
... tangent , of the arc , but the length is not material ) . From g or d draw a perpendicular af or dh . Through point a draw any line ( ai ) , and set off al = cg , or ai = cd , and draw the indefinite perpendicular ly or ix . - Set off ...
Σελίδα 38
... may be drawn to form tangents to a circumference , and enclose it instead of forming chords , and being included within the circle . Two general and very useful modes of constructing regular figures 38 B - CONSTRUCTIONALS .
... may be drawn to form tangents to a circumference , and enclose it instead of forming chords , and being included within the circle . Two general and very useful modes of constructing regular figures 38 B - CONSTRUCTIONALS .
Σελίδα 44
... tangent required , for join fd , then cfd , being an angle within a semicircle , will be a right angle ( E , Sect . 26 ) , and cf will be perpendicular to radius , as in case 1 . 59. A TANGENT to two Circles . Fig . 44. Circles A and B ...
... tangent required , for join fd , then cfd , being an angle within a semicircle , will be a right angle ( E , Sect . 26 ) , and cf will be perpendicular to radius , as in case 1 . 59. A TANGENT to two Circles . Fig . 44. Circles A and B ...
Σελίδα 45
Rolla Rouse. Then a line through g and h will be the tangent required . The arc ag is part of a semicircle of which af is diameter and the angle fga is a right angle ( E , Sect . 26 ) , as will also be the angle fhb . 60. A CIRCLE tangent ...
Rolla Rouse. Then a line through g and h will be the tangent required . The arc ag is part of a semicircle of which af is diameter and the angle fga is a right angle ( E , Sect . 26 ) , as will also be the angle fhb . 60. A CIRCLE tangent ...
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.