The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago Vitiated These Books are Corrected, and Some of Euclid's Demonstrations are Restored. Also, the Book of Euclid's Data, in Like Manner Corrected. viz. the first six books, together with the eleventh and twelfthDesilver, Thomas & Company, 1838 - 416 σελίδες |
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Αποτελέσματα 1 - 5 από τα 51.
Σελίδα 35
... passes , and BK , KD the other parallelograms which make up the whole figure ABCD , which E are therefore called the complements : the complement BK is equal to the com- plement KD . B G : Because ABCD is a parallelogram , and AC its ...
... passes , and BK , KD the other parallelograms which make up the whole figure ABCD , which E are therefore called the complements : the complement BK is equal to the com- plement KD . B G : Because ABCD is a parallelogram , and AC its ...
Σελίδα 54
... pass through the centre , it shall cut it at right angles , and , if it cuts it at right angles , it shall bisect it . Let ABC be a circle ; and let CD , a straight line drawn through the centre , bisect any straight line AB , which 54 ...
... pass through the centre , it shall cut it at right angles , and , if it cuts it at right angles , it shall bisect it . Let ABC be a circle ; and let CD , a straight line drawn through the centre , bisect any straight line AB , which 54 ...
Σελίδα 55
... pass through the centre , in the point F : it cuts it also at right angles . C Take ( 1. 3. ) E the centre of the circle , and join EA , EB . Then , because AF is equal to FB , and FE common to the two triangles AFE , BFE , there are ...
... pass through the centre , in the point F : it cuts it also at right angles . C Take ( 1. 3. ) E the centre of the circle , and join EA , EB . Then , because AF is equal to FB , and FE common to the two triangles AFE , BFE , there are ...
Σελίδα 57
... passes through the centre is always greater than one more remote ; and from the same point there can be drawn only two straight lines that are equal to one another , one upon each side of the shortest line . Let ABCD be a circle , and ...
... passes through the centre is always greater than one more remote ; and from the same point there can be drawn only two straight lines that are equal to one another , one upon each side of the shortest line . Let ABCD be a circle , and ...
Σελίδα 58
... passes through the centre . Of those which fall upon the concave part of the circumference AEFC , the greatest is AD , which passes through the centre ; and the nearer to it is always greater than the more remote , viz . DE than DF ...
... passes through the centre . Of those which fall upon the concave part of the circumference AEFC , the greatest is AD , which passes through the centre ; and the nearer to it is always greater than the more remote , viz . DE than DF ...
Συχνά εμφανιζόμενοι όροι και φράσεις
altitude angle ABC angle BAC base BC BC is equal BC is given bisected centre circle ABCD circumference Co-S cone cylinder demonstrated described diameter draw drawn equal angles equiangular equimultiples Euclid ex æquali excess fore given angle given in magnitude given in position given in species given magnitude given ratio given straight line gles gnomon join less Let ABC multiple parallel parallelogram parallelogram AC perpendicular point F polygon prism proportionals proposition pyramid Q. E. D. PROP radius ratio of AE rectangle CB rectangle contained rectilineal figure remaining angle right angles segment sides BA similar sine solid angle solid parallelopiped square of AC square of BC straight line AB straight line BC tangent THEOR third triangle ABC triplicate ratio vertex wherefore
Δημοφιλή αποσπάσματα
Σελίδα 45 - Ir a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.
Σελίδα 41 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Σελίδα 54 - Ir any two points be taken in the circumference of a circle, the straight line which joins them shall fall within the circle. Let ABC be a circle, and A, B any two points in the circumference ; the straight line drawn from A to B shall fall within the circle.
Σελίδα 18 - ABD, the less to the greater, which is impossible ; therefore BE is not in the same straight line with BC.
Σελίδα 10 - 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 8 - Let it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 256 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Σελίδα 129 - 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 23 - At a given point in a given straight line, to make a rectilineal angle equal to a given rectilineal angle. Let AB be the given straight line, and A...
Σελίδα 20 - ANY two angles of a triangle are together less than two right angles.