The Elements of Euclid, books i-vi; xi. 1-21; xii. 1,2; ed. by H.J. Hose, Βιβλίο 11853 |
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Αποτελέσματα 1 - 5 από τα 94.
Σελίδα 3
... less than a right angle . XIII . The boundary is the extremity of any thing . XIV . A figure is a portion of space which is enclosed by one or more boundaries ; and when all the points in a figure are also points in the same plane , the ...
... less than a right angle . XIII . The boundary is the extremity of any thing . XIV . A figure is a portion of space which is enclosed by one or more boundaries ; and when all the points in a figure are also points in the same plane , the ...
Σελίδα 9
... less than two right angles , then those two straight lines , being continually produced , shall at length meet on that side of the cutting line on which are the angles that are together less than two right angles . A OBS . 1. This axiom ...
... less than two right angles , then those two straight lines , being continually produced , shall at length meet on that side of the cutting line on which are the angles that are together less than two right angles . A OBS . 1. This axiom ...
Σελίδα 10
... less than two right angles . OBS . 2. When , as in the figures in Obs . 1 , a straight line EFGH cuts two other straight lines AB , CD in F , G , it makes with them eight angles , four on one side of EF , viz . AFE , AFG , FGC , CGH ...
... less than two right angles . OBS . 2. When , as in the figures in Obs . 1 , a straight line EFGH cuts two other straight lines AB , CD in F , G , it makes with them eight angles , four on one side of EF , viz . AFE , AFG , FGC , CGH ...
Σελίδα 12
... less . Let AB and c be the two given straight lines , of which AB is the greater . It is required to cut off from ab , the greater , a part equal to c , the less . From A , that extremity of AB to which the part to be cut off is ...
... less . Let AB and c be the two given straight lines , of which AB is the greater . It is required to cut off from ab , the greater , a part equal to c , the less . From A , that extremity of AB to which the part to be cut off is ...
Σελίδα 13
... less . Which was to be done . PROP . IV . THEOREM . If two triangles have ( 1 ) two sides of the one respectively equal to two sides of the other ; ( 2 ) the angle included by the two sides of the one equal to the angle included by the ...
... less . Which was to be done . PROP . IV . THEOREM . If two triangles have ( 1 ) two sides of the one respectively equal to two sides of the other ; ( 2 ) the angle included by the two sides of the one equal to the angle included by the ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ABC is equal adjacent angles angle ABC angle ACB angle BAC angle DEF angle EDF angles are equal angular points base BC bisected centre circle ABC circle DEF circumference const cut the circle diagonal draw equal angles equal Ax equals add equi equimultiples exterior angle FGHKL fore four magnitudes fourth given straight line gnomon hence the angle homologous hyps included angle interior and opposite join less Let ABC multiple opposite angle parallelogram perpendicular produced PROP proportional proved radius rectangle contained remaining angle respectively equal right angles segment shewn sides BC similar solid angle square of AC THEOR thing are equal third angle three angles touching the circle triangle ABC unequal
Δημοφιλή αποσπάσματα
Σελίδα 39 - To draw a straight line through a given point parallel to a given straight line. Let A be the given point, and BC the given straight line...
Σελίδα 52 - 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 16 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Σελίδα 5 - 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 11 - 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.
Σελίδα 105 - If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle ; the angles which this line makes with the line touching the circle, shall be equal to the angles which are in the alternate segments of the circle.
Σελίδα 118 - IF a straight line touch a circle, and from the point of contact a straight line be drawn at right angles to the touching line, the centre of the circle shall be in that line.
Σελίδα 66 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.
Σελίδα 6 - From the greater of two given straight lines to cut off a part equal to the less. Let AB and C be the two given straight lines, whereof AB is the greater.
Σελίδα 119 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.