The first book of Euclid's Elements, simplified, explained and illustrated, by W. Trollope |
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Αποτελέσματα 1 - 5 από τα 59.
Σελίδα 13
Let AB be the gn . st . line ; then it is required to describe an equilateral a upon it .
CONSTRUCTION . — From the cr . ... e . the A ABC is equilateral ; and it has
been described upon the gn . st . line AB . - Q . E . F . It is clear that , upon the
other ...
Let AB be the gn . st . line ; then it is required to describe an equilateral a upon it .
CONSTRUCTION . — From the cr . ... e . the A ABC is equilateral ; and it has
been described upon the gn . st . line AB . - Q . E . F . It is clear that , upon the
other ...
Σελίδα 17
ENUN . - To describe an isosceles A on a given finite straight line . PART . ENUN
. - Let AB be the gn . Fig . 1 . st . line ; then it is required to ... Hence the A ABC is
isosceles , and it has been described upon DA B E the gn . straight line AB .
ENUN . - To describe an isosceles A on a given finite straight line . PART . ENUN
. - Let AB be the gn . Fig . 1 . st . line ; then it is required to ... Hence the A ABC is
isosceles , and it has been described upon DA B E the gn . straight line AB .
Σελίδα 18
Enun . — Let ABC , DEF , be two As , which have the two sides AB , AC = to the
two sides DE , DF , each to each ; viz . AB = DE , and AC = DF , and BL also the <
BAC = Z EDF ; then the base BC shall = base EF ; and the area of the A ABC ...
Enun . — Let ABC , DEF , be two As , which have the two sides AB , AC = to the
two sides DE , DF , each to each ; viz . AB = DE , and AC = DF , and BL also the <
BAC = Z EDF ; then the base BC shall = base EF ; and the area of the A ABC ...
Σελίδα 20
Enun . — The angles at the base of an isosceles triangle are equal ; and if the
equal sides be produced , the angles upon the other side of the base shall be
equal . Part . Enun . - Let ABC be an isosc . A , of which the side AB = side ac (
Def .
Enun . — The angles at the base of an isosceles triangle are equal ; and if the
equal sides be produced , the angles upon the other side of the base shall be
equal . Part . Enun . - Let ABC be an isosc . A , of which the side AB = side ac (
Def .
Σελίδα 22
Let ABC , der be two isosceles As , having the sides AB , Ac of the one = to each
other , and also = to the sides DE , DF of the ... ENUN . - If two angles of a triangle
be equal to one another , the sides also which subtend , or are opposite to , the ...
Let ABC , der be two isosceles As , having the sides AB , Ac of the one = to each
other , and also = to the sides DE , DF of the ... ENUN . - If two angles of a triangle
be equal to one another , the sides also which subtend , or are opposite to , the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD adjacent alternate applied base BC bisect called coincide common Const contained Deducible definition demonstration describe diam diameter divide draw Enun ENUN.-If ENUN.-Let ABC Enun.-To Enun.—Let equal equilateral Euclid exterior extremity figure formed four given given point greater Hence interior intersect isosceles join length less Let ABC line drawn manner meet opposite sides parallel parallelogram position Post PROB produced proof Prop Proposition proved rectilineal remaining respectively right angles side bc square straight line THEOR Theorem third trapezium triangle vertical Wherefore XXIX XXXI XXXII XXXIV
Δημοφιλή αποσπάσματα
Σελίδα 58 - 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. either the sides adjacent to the equal...
Σελίδα 24 - Upon the same base, and on the same side of it, there cannot be two triangles, that have their sides which are terminated in one extremity of the base equal to one another, and likewise those which are terminated in the other extremity, equal to one another.
Σελίδα 34 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Σελίδα 6 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
Σελίδα 109 - 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 9 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Σελίδα 99 - 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 49 - If, from the ends of the side of a triangle, there be drawn two straight lines to a point within the triangle, these shall be less than, the other two sides of the triangle, but shall contain a greater angle. Let...
Σελίδα 104 - 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 6 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.