Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 94.
Σελίδα 14
... lines cannot enclose a space . ( They include a space , but do not enclose it , a third ... line meets two straight lines , so as to make the two interior angles on the ... draw xy , distances 14 A - DEFINITIONS , ETC. Polygons of four sides,
... lines cannot enclose a space . ( They include a space , but do not enclose it , a third ... line meets two straight lines , so as to make the two interior angles on the ... draw xy , distances 14 A - DEFINITIONS , ETC. Polygons of four sides,
Σελίδα 15
Rolla Rouse. AB , say a ' , draw xy , distances draw bb ' , cc , parallel to line EF , and at any dd ' , & c . , parallel to AB , and draw the lines 1.0 , 2 p , 3 q , & c . , parallel to xy . It will be then obvious that at distance a'o the ...
Rolla Rouse. AB , say a ' , draw xy , distances draw bb ' , cc , parallel to line EF , and at any dd ' , & c . , parallel to AB , and draw the lines 1.0 , 2 p , 3 q , & c . , parallel to xy . It will be then obvious that at distance a'o the ...
Σελίδα 19
... DRAW PERPENDICULAR LINES . ( a ) Geometrically . The best mode of drawing a perpen- dicular line from a given point in a given line , or letting fall a perpendicular from a given point on a given line , will be that shown in Fig . B 1 ...
... DRAW PERPENDICULAR LINES . ( a ) Geometrically . The best mode of drawing a perpen- dicular line from a given point in a given line , or letting fall a perpendicular from a given point on a given line , will be that shown in Fig . B 1 ...
Σελίδα 20
... 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 point d to let fall a perpendicular on line xy . At any angle or slant , ...
... 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 point d to let fall a perpendicular on line xy . At any angle or slant , ...
Σελίδα 21
... line from that point to be drawn along the other side ( ac ) of the right angle , and from point a , along that side , draw the line ac , continuing the same to d , or to any other distance required , either by an ordinary ruler or by ...
... line from that point to be drawn along the other side ( ac ) of the right angle , and from point a , along that side , draw the line ac , continuing the same to d , or to any other distance required , either by an ordinary ruler or by ...
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.