Scientific and practical geometry for self-instruction1879 |
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Σελίδα 16
... Before showing how the work of constructionals is performed , it may be of use to make some remarks on the requisite tools . On that subject , whilst drawing the figures with a 16 B - CONSTRUCTION ALS . of more than four sides,
... Before showing how the work of constructionals is performed , it may be of use to make some remarks on the requisite tools . On that subject , whilst drawing the figures with a 16 B - CONSTRUCTION ALS . of more than four sides,
Σελίδα 29
... construction of Triangles . 27. AN EQUILATERAL TRIANGLE . ( Fig . B 16. ) Base taken to equal line ab . With radius ab and successively with a , and with b as centre , draw arcs cutting at c , and complete the triangle by joining ca and ...
... construction of Triangles . 27. AN EQUILATERAL TRIANGLE . ( Fig . B 16. ) Base taken to equal line ab . With radius ab and successively with a , and with b as centre , draw arcs cutting at c , and complete the triangle by joining ca and ...
Σελίδα 32
... construction equal the given angles ) as alternate internal angles . ( C , Sect . 7. ) [ For drawing triangles , with other data , see Sect . 69 , & c . , post . ] 35. TO CONVERT a Scalene Triangle into an equivalent Isosceles 32 B ...
... construction equal the given angles ) as alternate internal angles . ( C , Sect . 7. ) [ For drawing triangles , with other data , see Sect . 69 , & c . , post . ] 35. TO CONVERT a Scalene Triangle into an equivalent Isosceles 32 B ...
Σελίδα 34
... construction . The areas of triangles abc and afc are by the mean pro- portional according to the squares of the sides dh and dg in Fig . 26. And the triangle hij being similar to triangle afc , and df in Fig . 26 being equal to the df ...
... construction . The areas of triangles abc and afc are by the mean pro- portional according to the squares of the sides dh and dg in Fig . 26. And the triangle hij being similar to triangle afc , and df in Fig . 26 being equal to the df ...
Σελίδα 35
... construction , and the sides equal as proportionals ( F 11 ) , cb : ba : ih : ha and cb = ba : ih = ha , and the like as to the other sides . Also ( F 11 ) , af : baag : ha , or proportioned as difference and sides . ( 4 ) Abcut a ...
... construction , and the sides equal as proportionals ( F 11 ) , cb : ba : ih : ha and cb = ba : ih = ha , and the like as to the other sides . Also ( F 11 ) , af : baag : ha , or proportioned as difference and sides . ( 4 ) Abcut a ...
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.