Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 32.
Σελίδα xi
... including the doctrine of " Obliques " and the comparative lengths of " Chords in Circles ; " attaining results by a single tool where many are used in Euclid . The remaining Sections of Div . C ( 28 to INTRODUCTION . xi.
... including the doctrine of " Obliques " and the comparative lengths of " Chords in Circles ; " attaining results by a single tool where many are used in Euclid . The remaining Sections of Div . C ( 28 to INTRODUCTION . xi.
Σελίδα 2
... Oblique , when changing their distance , and which would meet on the side of the least distance if continued ; thus in Fig . A 3 , the lines CD and EF are oblique . Perpendicular , when with one end joining another line , otherwise than ...
... Oblique , when changing their distance , and which would meet on the side of the least distance if continued ; thus in Fig . A 3 , the lines CD and EF are oblique . Perpendicular , when with one end joining another line , otherwise than ...
Σελίδα 3
... two right angles , and less than four , as marked by cft or the arc 5 to 5 . Oblique , when otherwise than a right angle , whether more or less . Angles are also salient or re - entering in different B 2 SECTIONS 6 , 7 .
... two right angles , and less than four , as marked by cft or the arc 5 to 5 . Oblique , when otherwise than a right angle , whether more or less . Angles are also salient or re - entering in different B 2 SECTIONS 6 , 7 .
Σελίδα 9
... obliquely through the opposite sides of it , and when represented on a plane surface differs from a circle , in the contour or boundary line , being proportioned to cross axes of unequal length instead of the equal radii of a circle ...
... obliquely through the opposite sides of it , and when represented on a plane surface differs from a circle , in the contour or boundary line , being proportioned to cross axes of unequal length instead of the equal radii of a circle ...
Σελίδα 22
... oblique angle , draw line ab touching line cd at any point b . With centre b and radius ba , draw semicircle cad . Set off arc ca and from d the equal arc df . Then a line through points a and ƒ will be parallel to line cd . 3. By equal ...
... oblique angle , draw line ab touching line cd at any point b . With centre b and radius ba , draw semicircle cad . Set off arc ca and from d the equal arc df . Then a line through points a and ƒ will be parallel to line cd . 3. By equal ...
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.