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 σελίδες |
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Σελίδα 67
... touched internally by the circle DEC in the point C : they have not the same centre . For , if they can , let it be F ; join FC , and draw any straight line FEB meeting the circumferences in E and B. Then , ( I. def . 30. ) because F is ...
... touched internally by the circle DEC in the point C : they have not the same centre . For , if they can , let it be F ; join FC , and draw any straight line FEB meeting the circumferences in E and B. Then , ( I. def . 30. ) because F is ...
Σελίδα 70
... touched externally . The expression , " the point of contact , " seems to assume that there is but one point of contact , which is proved in a following proposition , the 13th . Mr. Walker proposes to say a point of contact ; but this ...
... touched externally . The expression , " the point of contact , " seems to assume that there is but one point of contact , which is proved in a following proposition , the 13th . Mr. Walker proposes to say a point of contact ; but this ...
Σελίδα 73
... touches ( III . def . 1. ) the circle ; and that it touches it only in one point , because at every point except A , it ... touching the circle . Find ( III . 1. ) E the centre of the circle , and draw AE cutting the circumference in D ...
... touches ( III . def . 1. ) the circle ; and that it touches it only in one point , because at every point except A , it ... touching the circle . Find ( III . 1. ) E the centre of the circle , and draw AE cutting the circumference in D ...
Σελίδα 74
... touches ( III . 16. cor . ) the circle . Now , EB is from the ex- F B ' E P B H Cor . If AB be produced to H , AH is bisected ( III . 3. ) in B. Hence a chord in a circle touching a concentric one , is bisected at the point of contact ...
... touches ( III . 16. cor . ) the circle . Now , EB is from the ex- F B ' E P B H Cor . If AB be produced to H , AH is bisected ( III . 3. ) in B. Hence a chord in a circle touching a concentric one , is bisected at the point of contact ...
Σελίδα 75
... touches the circle ABC , and FC is drawn from the centre to the point of contact , FC is perpendicular ( III . 18. ) to DE ; therefore FCE is a right angle : but ACE is also ( hyp . ) a right angle ; therefore FCE is equal to ACE ...
... touches the circle ABC , and FC is drawn from the centre to the point of contact , FC is perpendicular ( III . 18. ) to DE ; therefore FCE is a right angle : but ACE is also ( hyp . ) a right angle ; therefore FCE is equal to ACE ...
Άλλες εκδόσεις - Προβολή όλων
The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With ... Euclid Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 4 - A rhombus is that which has all its sides equal, but its angles are not right angles.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 36 - PARALLELOGRAMS upon the same base, and between the same parallels, are equal to one another...