The Elements of Euclid; viz. the first six books, together with the eleventh and twelfth. Also the book of Euclid's Data. By R. Simson. To which is added, A treatise on the construction of the trigonometrical canon [by J. Christison] and A concise account of logarithms [by A. Robertson].1834 |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 1
... . VIII . " A plane angle is the inclination of two lines to one See N. " another in a plane , which meet together , but are not in " the same direction . " B IX . A plane rectilineal angle is the inclination of THE ...
... . VIII . " A plane angle is the inclination of two lines to one See N. " another in a plane , which meet together , but are not in " the same direction . " B IX . A plane rectilineal angle is the inclination of THE ...
Σελίδα 2
... meet together , but are not in the same straight line . 6 N.B. When several angles are at one point B , any one of ' them is expressed by three letters , of which the letter that ' is at the vertex of the angle , that is , at the point ...
... meet together , but are not in the same straight line . 6 N.B. When several angles are at one point B , any one of ' them is expressed by three letters , of which the letter that ' is at the vertex of the angle , that is , at the point ...
Σελίδα 4
... meet . POSTULATES . I. LET it be granted , that a straight line may be drawn from any one point to any other point . II . That a terminated straight line may be produced to any length in a straight line . III . And that a circle may be ...
... meet . POSTULATES . I. LET it be granted , that a straight line may be drawn from any one point to any other point . II . That a terminated straight line may be produced to any length in a straight line . III . And that a circle may be ...
Σελίδα 5
... meet two straight lines , so as to " make the two interior angles on the same side of it taken " together , less than two right angles , these straight lines . " being continually produced , shall at length meet upon " that side on ...
... meet two straight lines , so as to " make the two interior angles on the same side of it taken " together , less than two right angles , these straight lines . " being continually produced , shall at length meet upon " that side on ...
Σελίδα 23
... meet either towards B , D , or towards A , C : let them be pro- duced and meet towards B , D , in the point G ; therefore GEF is a triangle , and its exterior angle AEF is greater than the interior and opposite angle EFG ; but it is ...
... meet either towards B , D , or towards A , C : let them be pro- duced and meet towards B , D , in the point G ; therefore GEF is a triangle , and its exterior angle AEF is greater than the interior and opposite angle EFG ; but it is ...
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ABC is given AC is equal altitude angle ABC angle BAC base BC bisected centre circle ABCD circle EFGH circumference common logarithm cone Constr cylinder demonstrated described diameter draw drawn equal angles equiangular equimultiples Euclid ex æquali excess fore given angle given in magnitude given in position given in species given magnitude given ratio given straight line gnomon greater join less Let ABC logarithm multiple parallel parallelogram perpendicular point F polygon prism Prop proportionals Q. E. D. PROPOSITION radius ratio of AE rectangle CB rectangle contained rectilineal figure remaining angle right angles segment shewn sides BA similar sine solid angle solid parallelopiped square of AC straight line AB straight line BC tangent THEOR.-If tiple triangle ABC vertex wherefore
Δημοφιλή αποσπάσματα
Σελίδα 32 - 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...
Σελίδα 138 - 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.
Σελίδα 39 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Σελίδα 22 - If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another...
Σελίδα 41 - If a straight line be bisected and produced to any point, the rectangle contained by the whole line thus produced and the part of it produced, together •with the square on half the line bisected, is equal to the square on the straight line which is made up of the half and the part produced.
Σελίδα 5 - If two triangles have two sides of the one equal to two sides of the other, each to each, but the...
Σελίδα 38 - IF a straight line be divided into any two parts, the rectangles contained by the whole and each of the parts, are together equal to the square of the whole line. Let the straight line AB be divided...
Σελίδα 262 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Σελίδα 89 - PBOR. —To describe an isosceles triangle, having each of the angles at the base, double of the third angle. Take any straight...
Σελίδα 165 - Wherefore, in equal circles &c. QED PROPOSITION B. THEOREM If the vertical angle of a triangle be bisected by a straight line which likewise cuts the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the segments of the base, together with the square on the straight line which bisects the angle.