Elements of Plane Geometry According to EuclidW. and R. Chambers, 1837 - 240 σελίδες |
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Σελίδα xviii
... greater extent . The Italian geo- meter , Lucus Valerius , determined the centre of gravity of conoids and spheroids , and of some of their segments ; and Albert Girard determined the surfaces of spherical triangles and polygons ...
... greater extent . The Italian geo- meter , Lucus Valerius , determined the centre of gravity of conoids and spheroids , and of some of their segments ; and Albert Girard determined the surfaces of spherical triangles and polygons ...
Σελίδα 4
... greater than two right angles , it is said to be re - entrant , as B. 35. Any side of a rectilineal figure may be called the base . In a right - angled triangle , the side opposite to the right angle is called the hypotenuse ; either of ...
... greater than two right angles , it is said to be re - entrant , as B. 35. Any side of a rectilineal figure may be called the base . In a right - angled triangle , the side opposite to the right angle is called the hypotenuse ; either of ...
Σελίδα 5
... greater than its part . 10. All right angles are equal to one another . 11. Two straight lines cannot be drawn through the same point , parallel to the same straight line , without coinciding with one another . 12. It is possible for ...
... greater than its part . 10. All right angles are equal to one another . 11. Two straight lines cannot be drawn through the same point , parallel to the same straight line , without coinciding with one another . 12. It is possible for ...
Σελίδα 6
... greater and less . Thus A B means that A is greater than B ; and AB , that A is less than B. The sign , called equal , is the sign of equality ; thus A = B implies that A is equal to B. The small letters a , b , c , m , n , p , q , & c ...
... greater and less . Thus A B means that A is greater than B ; and AB , that A is less than B. The sign , called equal , is the sign of equality ; thus A = B implies that A is equal to B. The small letters a , b , c , m , n , p , q , & c ...
Σελίδα 8
... greater . It is re- quired to cut off from AB , the part equal to C , the less . greater , a C From the point A draw ( I. 2 ) the straight D E B line AD equal to C ; and from the centre A , and with the ra- dius AD , describe ( Post ...
... greater . It is re- quired to cut off from AB , the part equal to C , the less . greater , a C From the point A draw ( I. 2 ) the straight D E B line AD equal to C ; and from the centre A , and with the ra- dius AD , describe ( Post ...
Άλλες εκδόσεις - Προβολή όλων
Elements of Plane Geometry, According to Euclid: As Improved by Simson and ... Andrew Bell,Associate Professor of History Andrew Bell Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2008 |
Elements of Plane Geometry, According to Euclid: As Improved by Simson and ... Andrew Bell Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2008 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC is equal angle ABC angle ACB angle BAC angle BCD angle EDF apothem base BC bisected centre chord circle ABC circumference described diameter double draw equal angles equal to AC equiangular equilateral polygon equimultiples exterior angle fore geometry given circle given line given point given rectilineal given straight line gnomon greater hypotenuse inscribed interminate less Let ABC magnitudes multiple number of sides opposite angle parallel parallelogram perimeter perpendicular polygon porism produced proportional PROPOSITION radius rectangle contained rectilineal figure regular polygon remaining angle right angles right-angled triangle Schol segment semicircle semiperimeter similar sine square of AC tangent THEOREM touches the circle triangle ABC triangle DEF twice the rectangle vulgar fraction wherefore
Δημοφιλή αποσπάσματα
Σελίδα 1 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals the wholes are equal. 3. If equals be taken from equals the remainders are equal. 4. If equals be added to unequals the wholes are unequal. 5. If equals be taken from unequals the remainders are unequal. 6. Things which are double of the same thing are equal to one another.
Σελίδα 73 - 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 9 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line : it is required to divide it intotwo equal parts.
Σελίδα 4 - If two triangles have two sides of the one equal to two sides of the...
Σελίδα 139 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides. Let AC, CF be equiangular parallelograms, having the angle BCD equal to the angle ECG ; the ratio of the parallelogram AC to the parallelogram CF, is the same with the ratio which is compounded of the ratios of their sides. Let BC, CG, be placed in a straight line ; therefore DC and CE are also in a straight line (2.
Σελίδα 23 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
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 80 - A circle is said to be described about a rectilineal figure, when the circumference of the circle passes through all the angular points of the figure about which it is described. 7. A straight line is said to be placed in a circle, when the extremities of it are in the circumference of the circle.
Σελίδα 27 - Parallelograms upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 44 - If a straight line be divided into any two parts, the squares of the whole line and of one of the parts are equal to twice the rectangle contained by the whole and that part, together with the square of the other part. Let the straight line AB be divided into any two parts at the point C : the squares of AB, BC shall be equal to twice the rectangle AB, BC, together with the square of AC.