Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with Explanatory Notes .... the first six booksJ. W. Parker & son, 1860 - 361 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 7
... points in which the circles cut one another , draw the straight lines CA , CB to the points A , B. ( post . 1. ) Then ABC shall be an equilateral triangle . Because the point A is the center of the circle BCD , therefore AC is equal to ...
... points in which the circles cut one another , draw the straight lines CA , CB to the points A , B. ( post . 1. ) Then ABC shall be an equilateral triangle . Because the point A is the center of the circle BCD , therefore AC is equal to ...
Σελίδα 13
... a given rectilineal angle , that is , to divide it into two equal angles . Let BAC be the given rectilineal angle . It is required to bisect it . D A A B F In AB take any point D ; from AC cut off AE equal to AD , ( 1. 3. ) and join DE ...
... a given rectilineal angle , that is , to divide it into two equal angles . Let BAC be the given rectilineal angle . It is required to bisect it . D A A B F In AB take any point D ; from AC cut off AE equal to AD , ( 1. 3. ) and join DE ...
Σελίδα 14
... given point in the same . Let AB be the given straight line , and Ca given point in it . It is required to draw a straight line from the point C at right angles to AB . F " D C E B In AC take any point D , and make CE equal to CD ; ( I ...
... given point in the same . Let AB be the given straight line , and Ca given point in it . It is required to draw a straight line from the point C at right angles to AB . F " D C E B In AC take any point D , and make CE equal to CD ; ( I ...
Σελίδα 15
... given straight line , which may be produced any length both ways , and let C be a point without it . It is required to draw a straight line perpendicular to AB from the point C. F E H B G D Upon the other side of AB take any point D ...
... given straight line , which may be produced any length both ways , and let C be a point without it . It is required to draw a straight line perpendicular to AB from the point C. F E H B G D Upon the other side of AB take any point D ...
Σελίδα 22
... A , B , C : and therefore the triangle KFG has its three sides KF , FG , GK , equal to the three given straight lines A , B , C. Q.E.F. PROPOSITION XXIII . PROBLEM . At a given point in a given straight line , to make a rectilineal angle ...
... A , B , C : and therefore the triangle KFG has its three sides KF , FG , GK , equal to the three given straight lines A , B , C. Q.E.F. PROPOSITION XXIII . PROBLEM . At a given point in a given straight line , to make a rectilineal angle ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
A₁ ABCD AC is equal Algebraically angle ABC angle ACB angle BAC Apply Euc axiom base BC chord circle ABC constr describe a circle diagonals diameter divided double draw equal angles equiangular equilateral triangle equimultiples Euclid Euclid's Elements exterior angle Geometrical given circle given line given point given straight line given triangle gnomon greater hypotenuse inscribed intersection isosceles triangle less Let ABC line AC lines be drawn meet the circumference multiple opposite angles parallelogram pentagon perpendicular porism problem produced Prop proportionals proved Q.E.D. PROPOSITION quadrilateral radius ratio rectangle contained rectilineal figure remaining angle right angles right-angled triangle segment semicircle shew shewn similar similar triangles square on AC tangent THEOREM touch the circle trapezium triangle ABC twice the rectangle vertex vertical angle wherefore
Δημοφιλή αποσπάσματα
Σελίδα 54 - If two triangles have two sides of the one equal to two sides of the...
Σελίδα 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, together with the square...
Σελίδα 38 - 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.
Σελίδα 144 - 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 18 - Any two angles of a triangle are together less than two right angles.
Σελίδα 266 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Σελίδα 152 - 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 7 - From a given point to draw a straight line equal to a given straight line. Let A be the given point, and BC the given straight line; it is required to draw from the point A a straight line equal to BC.
Σελίδα 3 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 96 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side subtending the obtuse angle is greater than the squares on the sides containing the obtuse angle, by twice the rectangle contained by the side...