Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 89.
Σελίδα 1
... lines of sur- faces , and points of lines . 5. Lines , are right ( or straight ) , curved ( or bent ) , and mixed , or broken . A right line is the direct or shortest line between any B two points ; a curved line continually changes its ...
... lines of sur- faces , and points of lines . 5. Lines , are right ( or straight ) , curved ( or bent ) , and mixed , or broken . A right line is the direct or shortest line between any B two points ; a curved line continually changes its ...
Σελίδα 2
... line would be one in part right or straight and in part curved or bent , ib , bc ; and a broken line would be either a mixed line , or two right lines with different directions , kf , fa . 6. Lines are in their direction and relation to ...
... line would be one in part right or straight and in part curved or bent , ib , bc ; and a broken line would be either a mixed line , or two right lines with different directions , kf , fa . 6. Lines are in their direction and relation to ...
Σελίδα 3
... line m.n , is tangental to the circle . 7. An Angle is the inclination or opening of two lines ( unless otherwise stated , two right lines ) having different directions and meeting in a point : -Thus in Fig . C 1 , the lines kf and If ...
... line m.n , is tangental to the circle . 7. An Angle is the inclination or opening of two lines ( unless otherwise stated , two right lines ) having different directions and meeting in a point : -Thus in Fig . C 1 , the lines kf and If ...
Σελίδα 4
... right line may in every point coincide with the figure , as for instance a flat table with which a right or straight rule will in all positions when placed on it coincide ; and curved where such right line will only in part coincide ...
... right line may in every point coincide with the figure , as for instance a flat table with which a right or straight rule will in all positions when placed on it coincide ; and curved where such right line will only in part coincide ...
Σελίδα 7
... line drawn from one angle of a right - lined figure to another and opposed angle . Thus in Fig . C 9 and 10 the lines bd and ca are severally diagonals . 19. A Circle is a plane figure , bounded by a curved line called the Circumference ...
... line drawn from one angle of a right - lined figure to another and opposed angle . Thus in Fig . C 9 and 10 the lines bd and ca are severally diagonals . 19. A Circle is a plane figure , bounded by a curved line called the Circumference ...
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.