The school Euclid: comprising the first four books, by A.K. Isbister |
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Αποτελέσματα 1 - 5 από τα 25.
Σελίδα 13
Let the vertex D of the triangle ADB fall within the triangle ACB . A B CONSTRUCTION Join the vertices C and D , and produce AC , AD to E , F. DEMONSTRATION Because in the triangle ACD , AC is assumed to be equal to AD , therefore the ...
Let the vertex D of the triangle ADB fall within the triangle ACB . A B CONSTRUCTION Join the vertices C and D , and produce AC , AD to E , F. DEMONSTRATION Because in the triangle ACD , AC is assumed to be equal to AD , therefore the ...
Σελίδα 34
If a straight line , falling upon two other straight lines , make the alternate angles equal to one another , then these two straight lines shall be parallel . ( References - Prop . 1. 16 ; def . 35. ) Let the straight line EF , which ...
If a straight line , falling upon two other straight lines , make the alternate angles equal to one another , then these two straight lines shall be parallel . ( References - Prop . 1. 16 ; def . 35. ) Let the straight line EF , which ...
Σελίδα 35
Let the straight line EF , which falls upon the two straight lines , AB , CD , make the alternate angles , AEF , EFD , equal to one another . Then AB shall be parallel to CD . A E B Z F CONSTRUCTION For , if AB be not parallel to CD ...
Let the straight line EF , which falls upon the two straight lines , AB , CD , make the alternate angles , AEF , EFD , equal to one another . Then AB shall be parallel to CD . A E B Z F CONSTRUCTION For , if AB be not parallel to CD ...
Σελίδα 36
If a straight line falling upon two other straight lines , make the exterior angle equal to the interior and opposite , upon the same side of the line , or make the interior angles upon the same side , together equal to two right angles ...
If a straight line falling upon two other straight lines , make the exterior angle equal to the interior and opposite , upon the same side of the line , or make the interior angles upon the same side , together equal to two right angles ...
Σελίδα 37
If a straight line fall upon two parallel straight lines , then it makes the alternate angles equal to each other ; and the exterior angle equal to the interior and opposite angle upon the same side ; and likewise the two interior ...
If a straight line fall upon two parallel straight lines , then it makes the alternate angles equal to each other ; and the exterior angle equal to the interior and opposite angle upon the same side ; and likewise the two interior ...
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The School Euclid: Comprising the First Four Books, by A.K. Isbister Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
The School Euclid: Comprising the First Four Books, by A.K. Isbister Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angle ABC angle BAC angle BCD angle equal assumed base base BC BC is equal bisect centre circle ABC circumference coincide common constr CONSTRUCTION DEMONSTRATION describe diameter distance divided double draw Edition equal to AC equilateral and equiangular exterior angle extremity fall figure four given circle given straight line greater half impossible inscribed join less Let ABC likewise manner meet opposite angles parallel parallelogram pass pentagon perpendicular produced proved Q. E. D. PROP reason rectangle contained References-Prop remaining angle right angles segment semicircle shown side BC sides square of AC straight line AC THEOREM third touches the circle triangle ABC twice the rectangle wherefore whole
Δημοφιλή αποσπάσματα
Σελίδα 141 - 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 35 - 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 equal to two right angles.
Σελίδα 71 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square of the side subtending the obtuse angle, is greater than the squares of the sides containing the obtuse angle, by twice the rectangle contained by the side upon which, when produced, the perpendicular falls, and the straight line intercepted without the triangle, between the perpendicular and the obtuse angle. Let ABC be an obtuse-angled triangle, having the obtuse angle...
Σελίδα 33 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Σελίδα 61 - 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 of...
Σελίδα 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 27 - ... shall be greater than the base of the other. Let ABC, DEF be two triangles, which have the two sides AB, AC, equal to the two DE, DF, each to each, viz.
Σελίδα 77 - An angle in a segment is the angle contained by two straight lines drawn from any point in the circumference of the segment to the extremities of the straight line which is the base of the segment.
Σελίδα 15 - The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles.