An Elementary Course of Plane GeometryThomas Murray, 1870 - 16 σελίδες |
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Αποτελέσματα 1 - 5 από τα 20.
Σελίδα 2
... ruler is used to test surfaces in this way by joiners , stone - cutters , and the workmen who prepare plates for the engraver . If , when the ruler is applied to the surface , no light can be seen between them , the surface is true . 6 ...
... ruler is used to test surfaces in this way by joiners , stone - cutters , and the workmen who prepare plates for the engraver . If , when the ruler is applied to the surface , no light can be seen between them , the surface is true . 6 ...
Σελίδα 3
... ruler . Fig . 6 . Another easy method of obtaining a straight line is to fold a sheet of paper . 9. By means of the even drawing - board and straight ruler we can draw , with pen or pencil ,. B 2 Plane Geometry . 3.
... ruler . Fig . 6 . Another easy method of obtaining a straight line is to fold a sheet of paper . 9. By means of the even drawing - board and straight ruler we can draw , with pen or pencil ,. B 2 Plane Geometry . 3.
Σελίδα 4
... ruler . 10. Rulers for drawing usually have all their edges straight , and are made flat and thin , in order that a ... ruler frequently warps , and then , the planes being untrue , the line of their inter- section is no longer straight ...
... ruler . 10. Rulers for drawing usually have all their edges straight , and are made flat and thin , in order that a ... ruler frequently warps , and then , the planes being untrue , the line of their inter- section is no longer straight ...
Σελίδα 13
... ruler to the line A B , and sliding the square along it . This plan is particularly useful when several per- pendiculars to the same line are required . Squares used by the carpenter , stone - cutter , designer , and joiner . - Method ...
... ruler to the line A B , and sliding the square along it . This plan is particularly useful when several per- pendiculars to the same line are required . Squares used by the carpenter , stone - cutter , designer , and joiner . - Method ...
Σελίδα 14
... ruler placed on a sheet of paper , and draw a straight line , following exactly the straight edge of the square . Now , without moving the ruler , turn the square over this line , and apply it again to the edge of the ruler , so that it ...
... ruler placed on a sheet of paper , and draw a straight line , following exactly the straight edge of the square . Now , without moving the ruler , turn the square over this line , and apply it again to the edge of the ruler , so that it ...
Άλλες εκδόσεις - Προβολή όλων
An Elementary Course of Plane Geometry and Mensuration Richard Wormell Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
A B C adjacent angles alternate angles angle equal angular points apex base bisect centre centre of symmetry chord circumscribed coincide construction contained cumference decagon describe a circle diagonals diameter dicular distance divide dodecagon draw a straight equal arcs equal circles equilateral triangle extremities figure Find the area Geometry given angle given circle given point given polygon given radius given straight line greater half height Hence hexagon hypothenuse inscribed inscribed angle instrument interior angles isosceles triangle length line drawn line joining line parallel measure middle point number of sides opposite angles opposite sides parallel straight lines parallelogram pentagon perimeter perpen perpendicular plane Plane Geometry point of contact point of intersection proportional protractor Prove quadrilateral radii ratio rectangle regular polygon respectively equal rhombus right-angled triangle ruler secant segments similar square symmetrical axis tangent vertical
Δημοφιλή αποσπάσματα
Σελίδα 33 - Any two sides of a triangle are together greater than the third side.
Σελίδα 266 - IF from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, shall be equal to the square of the line which touches it.
Σελίδα vi - In my own time," says Seneca, "there have been inventions of this sort, transparent windows, tubes for diffusing warmth equally through all parts of a building, short-hand, which has been carried to such a perfection that a writer can keep pace with the most rapid speaker. But the inventing of such things is drudgery for the lowest slaves; philosophy lies deeper. It is not her office to teach men how to use their hands.
Σελίδα 59 - 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 together equal to two right angles.
Σελίδα 146 - If from a point without a circle a tangent and a secant be drawn, the tangent is a mean proportional between the whole secant and its external segment.
Σελίδα 153 - Describe a circle which shall pass through two given points, and have its centre in a given line.
Σελίδα 68 - If two parallel lines are cut by a third straight line, the sum of the two interior angles on the same side of the transversal is equal to two right angles, (p.
Σελίδα 86 - If a straight line be divided into any two parts, the square on the whole line is equal to the squares on the two parts, together with twice the rectangle contained by the two parts.
Σελίδα 264 - To prove that the exterior angle of a triangle is equal to the sum of the two interior opposite angles (see fig.
Σελίδα 11 - I., 5), (3) that, if two straight lines cut one another, the vertically opposite angles are equal (Eucl.