Scientific and practical geometry for self-instruction1879 |
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Αποτελέσματα 1 - 5 από τα 52.
Σελίδα x
... ( similar to 1 , 47 of Euclid ) , that " In a right - angled triangle , the square on the side opposed to the right angle ( the hypothenuse ) is equivalent with the squares on the two sides which include the right angle ( the base and ...
... ( similar to 1 , 47 of Euclid ) , that " In a right - angled triangle , the square on the side opposed to the right angle ( the hypothenuse ) is equivalent with the squares on the two sides which include the right angle ( the base and ...
Σελίδα xi
... similar figures are proportional to the squares of their cor- responding sides or diagonals " ( given in Div . F ) , form the keystone to the most interesting and useful doctrine of pro- portionals , as regards the areas of surfaces ...
... similar figures are proportional to the squares of their cor- responding sides or diagonals " ( given in Div . F ) , form the keystone to the most interesting and useful doctrine of pro- portionals , as regards the areas of surfaces ...
Σελίδα 10
... similar to . " 23. Proportions are expressed by colons and double colons as to geometrical proportions , with which geometry has , with rare exceptions , to deal ; or by dots and double dots in relation to arithmetical progression ...
... similar to . " 23. Proportions are expressed by colons and double colons as to geometrical proportions , with which geometry has , with rare exceptions , to deal ; or by dots and double dots in relation to arithmetical progression ...
Σελίδα 29
... similar and equiangular , the sides being parallel ( F , Sect . 29 ) . The sides will also be equal by the proportion ka : hike : hj ( F , Sect . 11 ) . On the ground on a large scale . In such case the triangle will be best constructed ...
... similar and equiangular , the sides being parallel ( F , Sect . 29 ) . The sides will also be equal by the proportion ka : hike : hj ( F , Sect . 11 ) . On the ground on a large scale . In such case the triangle will be best constructed ...
Σελίδα 34
... similar by 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 ...
... similar by 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 ...
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.