The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With Notes and Illustrations, and an Appendix in Five BooksA. & C. Black, 1837 - 390 sider |
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Side 1
... means of two wires , or other substances , bent similarly ; as , though these may coincide entirely when turned in one direction , they will coincide only in some points when placed otherwise . B can two straight lines have a common ...
... means of two wires , or other substances , bent similarly ; as , though these may coincide entirely when turned in one direction , they will coincide only in some points when placed otherwise . B can two straight lines have a common ...
Side 6
... means of a cord or other line of invariable length , fixed at one extremity , or by employing another circle , already drawn , as a pattern . The latter mode , however , does not agree with the third postulate , as it does not enable us ...
... means of a cord or other line of invariable length , fixed at one extremity , or by employing another circle , already drawn , as a pattern . The latter mode , however , does not agree with the third postulate , as it does not enable us ...
Side 8
... means the sixteenth proposition of the third book ; and I. ax . 2. , the second axiom of the first book . So also hyp . denotes hypothesis , and const . construction . By a scholium is meant a note or observation . It will be shown in ...
... means the sixteenth proposition of the third book ; and I. ax . 2. , the second axiom of the first book . So also hyp . denotes hypothesis , and const . construction . By a scholium is meant a note or observation . It will be shown in ...
Side 10
... means of the compasses , as was pointed out in the preceding proposition . † The meaning of the expression each to each , or respectively , which is used in the same sense , will be known from its application here . Were this expres ...
... means of the compasses , as was pointed out in the preceding proposition . † The meaning of the expression each to each , or respectively , which is used in the same sense , will be known from its application here . Were this expres ...
Side 13
... means of the fourth proposition , that if the supposition were true , the triangle DBC would be equal in magnitude to ACB : but this being contrary to the 9th axiom , we conclude that AB and AC cannot be unequal , since the supposition ...
... means of the fourth proposition , that if the supposition were true , the triangle DBC would be equal in magnitude to ACB : but this being contrary to the 9th axiom , we conclude that AB and AC cannot be unequal , since the supposition ...
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Vanlige uttrykk og setninger
ABCD altitude angle ABC angle BAC angle equal BC is equal bisected centre chord circle ABC circumference cone const contained cylinder describe a circle diagonal diameter divided draw equal angles equal to AC equiangular equilateral Euclid exterior angle fore fourth given circle given point given ratio given straight line greater half Hence hypotenuse inscribed join less Let ABC magnitudes manner multiple opposite parallel parallelepiped parallelogram perpendicular polygon polyhedron prism PROB produced PROP proportional proposition pyramid radius rectangle rectilineal figure right angles Schol segments semicircle sides similar similar triangles solid angles square of AC straight lines drawn tangent THEOR third triangle ABC triplicate ratio vertex vertical angle wherefore
Populære avsnitt
Side 94 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Side 53 - If a straight line be divided into any two parts, the squares of the whole line and of one of the parts are equal to twice the rectangle contained by the whole and that part, together with the square of the other part. Let the straight line AB be divided into any two parts at the point C : the squares of AB, BC shall be equal to twice the rectangle AB, BC, together with the square of AC.
Side 143 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Side 4 - A rhombus is that which has all its sides equal, but its angles are not right angles.
Side 57 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts may be equal to the square on the other part.
Side 138 - IF a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those produced, proportionally; and if the sides, or the sides produced, be cut proportionally, the straight line which joins the points of section shall be parallel to the remaining side of the triangle...
Side 43 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.
Side 32 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 40 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Side 36 - PARALLELOGRAMS upon the same base, and between the same parallels, are equal to one another...