Elements of geometry and mensurationLongman, Brown, Green, and Longmans, 1854 - 192 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 7
... PARALLEL straight lines are such as , being in the same plane , never meet though produced ever so far both ways . Thus the straight lines A с B D AB , CD , are parallel to each other , if , being both on the plane of this paper , they ...
... PARALLEL straight lines are such as , being in the same plane , never meet though produced ever so far both ways . Thus the straight lines A с B D AB , CD , are parallel to each other , if , being both on the plane of this paper , they ...
Σελίδα 8
... parallel , is called a trapezium , as ABCD , where AD is parallel to BC , but AB is not parallel to CD . B D 16. CIRCLES . A circle is a plane surface bounded by a curved line , such that every point in this line is equally distant from ...
... parallel , is called a trapezium , as ABCD , where AD is parallel to BC , but AB is not parallel to CD . B D 16. CIRCLES . A circle is a plane surface bounded by a curved line , such that every point in this line is equally distant from ...
Σελίδα 13
... parallel straight lines ; and give an ex- ample . If a straight line were drawn on the ceiling , and an- other on the floor , these two lines being produced ever so far both ways would never meet . Would they neces- sarily be parallel ...
... parallel straight lines ; and give an ex- ample . If a straight line were drawn on the ceiling , and an- other on the floor , these two lines being produced ever so far both ways would never meet . Would they neces- sarily be parallel ...
Σελίδα 23
... parallel . [ The angles here described are , for shortness , called alternate angles . ] Let the straight lines AB , CD , be met by the straight line EF , so that AEF : LEFD ; or BEF = < CFE ; then AB is parallel to CD . For , if AB ...
... parallel . [ The angles here described are , for shortness , called alternate angles . ] Let the straight lines AB , CD , be met by the straight line EF , so that AEF : LEFD ; or BEF = < CFE ; then AB is parallel to CD . For , if AB ...
Σελίδα 24
... parallel straight lines be in- tersected by a third , the alternate angles are equal to one another ; and the exterior angle is equal to the in- terior and opposite upon the same side ; and also the two interior angles upon the same ...
... parallel straight lines be in- tersected by a third , the alternate angles are equal to one another ; and the exterior angle is equal to the in- terior and opposite upon the same side ; and also the two interior angles upon the same ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCDEF acres base bisect breadth centre chain chord circular circum circumference circumscribing circle compasses construction contained continued fraction curved decimal Diagonal Scale diagram diameter distance divided draw drawn edge equilateral triangle find the area find the length fraction frustum given angle given circle given line given point given straight line given triangle half height Hence hexagon inscribed instrument intersecting join Let ABCD lineal unit magnitude meet multiplied number of equal number of sides number of units opposite angle parallelogram perimeter perpendicular plane surface plot points of division PROB produced PROP proportional Protractor radii radius ratio rectangle rectangular regular polygon represent right angles shew shewn similar similar triangles square feet square foot square inches straight edge subtends suppose trapezium triangle ABC vernier vertex whole yards
Δημοφιλή αποσπάσματα
Σελίδα 32 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Σελίδα 19 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Σελίδα 27 - 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 32 - If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it; the angle contained by these two sides is a right angle.
Σελίδα 43 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 17 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Σελίδα 22 - Theorem. The greater side of every triangle is opposite to the greater angle. Let ABC be a triangle of which the side AC is greater than the side AB ; the angle ABC is also greater than the angle BCA. Because AC is greater than AB, make...
Σελίδα 192 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Σελίδα 126 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Σελίδα 20 - To draw a straight line perpendicular to a given straight line of an unlimited length, from a given point without it.