Elements of geometry and mensurationLongman, Brown, Green, and Longmans, 1854 - 192 σελίδες |
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Αποτελέσματα 1 - 5 από τα 90.
Σελίδα 8
... ABCD , or ADCB , or B BADC , & c . whichever we please . 14. A diagonal , or diameter , of a parallelogram is the straight line joining two of its opposite angular points . Thus AC , and BD are the diagonals , or diameters , of the ...
... ABCD , or ADCB , or B BADC , & c . whichever we please . 14. A diagonal , or diameter , of a parallelogram is the straight line joining two of its opposite angular points . Thus AC , and BD are the diagonals , or diameters , of the ...
Σελίδα 28
... ABCD , EBCF , be any two parallelograms , having the side BC common to both , and their opposite sides AD , EF in the same straight line AEDF ; the paral- lelogram ABCD shall be equal to the paral- lelogram EBCF . B ED EUCLID's ...
... ABCD , EBCF , be any two parallelograms , having the side BC common to both , and their opposite sides AD , EF in the same straight line AEDF ; the paral- lelogram ABCD shall be equal to the paral- lelogram EBCF . B ED EUCLID's ...
Σελίδα 29
... ABCD = the area EBCF . [ Observe , when D falls between A and E , DE must be added , instead of subtracted . ] COR . 1. Hence , also , all parallelograms upon equal bases and between the same two parallels ' are equal to one another ...
... ABCD = the area EBCF . [ Observe , when D falls between A and E , DE must be added , instead of subtracted . ] COR . 1. Hence , also , all parallelograms upon equal bases and between the same two parallels ' are equal to one another ...
Σελίδα 30
... ABCD are equal . Also , since △ BAD is a right angle , and AD is parallel to BE , .LABE is a right angle . But the opposite angles are equal , .. all the angles of ABED are right angles . Hence , by the definition , ABED is a square ...
... ABCD are equal . Also , since △ BAD is a right angle , and AD is parallel to BE , .LABE is a right angle . But the opposite angles are equal , .. all the angles of ABED are right angles . Hence , by the definition , ABED is a square ...
Σελίδα 42
... a quadrilateral inscribed in a circle ' . To be inscribed it is necessary , that all the angular points fall upon the circumference of the circle . Let ABCD be a four - sided plane figure , 42 GEOMETRY AS A SCIENCE .
... a quadrilateral inscribed in a circle ' . To be inscribed it is necessary , that all the angular points fall upon the circumference of the circle . Let ABCD be a four - sided plane figure , 42 GEOMETRY AS A SCIENCE .
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.