Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 65.
Σελίδα xii
... radius drawing an arc to cut the sides , and Sect . 11 of the Division will then apply . DIVISION F. Proportionals . In this most interesting and useful branch of geometry , extending to 55 Sections and upwards of 40 figures , great ...
... radius drawing an arc to cut the sides , and Sect . 11 of the Division will then apply . DIVISION F. Proportionals . In this most interesting and useful branch of geometry , extending to 55 Sections and upwards of 40 figures , great ...
Σελίδα 7
... Radius is half diameter ( af or sf ) . Arc , any part of circumference ( ik , il , & c . ) . Chord , a right line connecting the two extremes of an arc ( P p ) . Segment , any part of a circle bounded by an arc and chord ( P p P ) ...
... Radius is half diameter ( af or sf ) . Arc , any part of circumference ( ik , il , & c . ) . Chord , a right line connecting the two extremes of an arc ( P p ) . Segment , any part of a circle bounded by an arc and chord ( P p P ) ...
Σελίδα 8
... radius of former being fs , and of latter ps , the common chord being in this case sl , diameter ) . 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 ...
... radius of former being fs , and of latter ps , the common chord being in this case sl , diameter ) . 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 ...
Σελίδα 17
... radius , any circle may be drawn by a pencil ; and for set squares , to draw perpendiculars or parallels , an ordinary canvassing card cut diagonally will give a most useful pair of set squares . 5. For fine lines , the ruling pen is ...
... radius , any circle may be drawn by a pencil ; and for set squares , to draw perpendiculars or parallels , an ordinary canvassing card cut diagonally will give a most useful pair of set squares . 5. For fine lines , the ruling pen is ...
Σελίδα 22
... radius ba draw the arc ac , and with centre a and same radius draw the indefinite arc bx , and set off bd ac . = Then a line through points a and d will be parallel to line cf. In Euclid the forming alternate and equal angles is adopted ...
... radius ba draw the arc ac , and with centre a and same radius draw the indefinite arc bx , and set off bd ac . = Then a line through points a and d will be parallel to line cf. In Euclid the forming alternate and equal angles is adopted ...
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.