A School Euclid. Being Books I.&II. of Euclid's Elements. With Notes, Exercises and Explanations ... By C. Mansford1874 |
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Side 24
... fore the base FC is equal A to the base GB , and the triangle AFC to the triangle AGB , and the remaining angles of the one to the remaining angles of the other , each to each , to which the equal sides are opposite , namely the angle ...
... fore the base FC is equal A to the base GB , and the triangle AFC to the triangle AGB , and the remaining angles of the one to the remaining angles of the other , each to each , to which the equal sides are opposite , namely the angle ...
Side 30
... fore the angle DAF is equal to the angle EAF . [ I. 8. ] Therefore the given rectilineal angle BAC is bisected by the straight line AF . Q.E.F. If the equilateral triangle were not described on the side of DE remote from A the point F ...
... fore the angle DAF is equal to the angle EAF . [ I. 8. ] Therefore the given rectilineal angle BAC is bisected by the straight line AF . Q.E.F. If the equilateral triangle were not described on the side of DE remote from A the point F ...
Side 36
... fore BD is in the same straight line with CB . Therefore , if at a point , & c . Q.E.D. It is important to notice that CB and BD must lie on opposite sides of BA , otherwise they will not necessarily be in the same straight line . Thus ...
... fore BD is in the same straight line with CB . Therefore , if at a point , & c . Q.E.D. It is important to notice that CB and BD must lie on opposite sides of BA , otherwise they will not necessarily be in the same straight line . Thus ...
Side 39
... fore the angles ACD , ACB are greater than the angles ABC , ACB . But the angles ACD , ACB are together equal to two right angles . [ I. 13. ] Therefore the angles ABC , ACB are together less than two right angles . In like manner it ...
... fore the angles ACD , ACB are greater than the angles ABC , ACB . But the angles ACD , ACB are together equal to two right angles . [ I. 13. ] Therefore the angles ABC , ACB are together less than two right angles . In like manner it ...
Side 41
... fore AC is not equal to AB . Neither is AC less than AB , for then the angle ABC would be less than the angle ACB [ I. 18 ] ; but it is not [ Hyp . ] ; therefore AC is not less than AB . And it has been proved that AC is not equal to AB ...
... fore AC is not equal to AB . Neither is AC less than AB , for then the angle ABC would be less than the angle ACB [ I. 18 ] ; but it is not [ Hyp . ] ; therefore AC is not less than AB . And it has been proved that AC is not equal to AB ...
Andre utgaver - Vis alle
A School Euclid. Being Books I. & II. of Euclid's Elements, with Notes ... Euclid,Charles Mansford Uten tilgangsbegrensning - 1875 |
A school Euclid, being books i. & ii. of Euclid's Elements, with notes by C ... Euclides Uten tilgangsbegrensning - 1874 |
A School Euclid, Being Books I. & II. of Euclid's Elements, with Notes by C ... Euclides Ingen forhåndsvisning tilgjengelig - 2015 |
Vanlige uttrykk og setninger
ABCD AC is equal angle ABC angle ACB angle BAC angle EDF angle equal apply axioms base BC bisect BOOK called centre circle coincide common Const construction definitions demonstration describe diagonals diameter difference divided double draw drawn equal sides equal to AC equilateral triangle Euclid exercise exterior angle fall figure fore geometry given point given rectilineal given straight line gnomon greater Hence isosceles triangle join length less Let ABC meet method namely opposite angle opposite sides parallel parallel to CD parallelogram perpendicular PROBLEM produced prop PROPOSITION proved quadrilateral reason rectangle contained rectilineal figure remainder result right angles side BC sides square on AC Take THEOREM things triangle ABC true truths twice the rectangle unequal units whole
Populære avsnitt
Side 90 - 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.
Side 28 - If two triangles have two sides of the one equal to two sides of the...
Side 41 - Any two sides of a triangle are together greater than the third side.
Side 57 - IF a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles; and the three interior angles of every triangle are equal to two right angles.
Side 72 - To describe a parallelogram equal to a given rectilineal figure, and having an angle equal to a given rectilineal angle. Let ABCD be the given rectilineal figure, and E the given rectilineal angle. It is required to describe a parallelogram equal to ABCD, and having an angle equal to E.
Side 75 - 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 89 - 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...
Side 55 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another; and the exterior angle equal to the interior and opposite upon the same side; and likewise the two interior angles upon the same side together equal to two right angles...
Side 28 - A two triangles, having the two sides AB, AC, equal to the two sides \ DE, DF, each to each, viz: AB to DE, and AC to DF; and also the base BC equal to the base EF.
Side 69 - 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.