Elements of Plane Geometry According to EuclidW. and R. Chambers, 1837 - 240 páginas |
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Página 5
... 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 another figure to exist , equal in every respect to any given ... A corollary is a ...
... 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 another figure to exist , equal in every respect to any given ... A corollary is a ...
Página 7
... straight line . Let AB be the given straight line ; it is required to de- scribe an equilateral triangle upon it . From the centre A , at the distance AB , describe ( Postu- laté 3 ) the circle BCD , and from the centre B , at the dis ...
... straight line . Let AB be the given straight line ; it is required to de- scribe an equilateral triangle upon it . From the centre A , at the distance AB , describe ( Postu- laté 3 ) the circle BCD , and from the centre B , at the dis ...
Página 8
... straight line AL is equal to BC . Wherefore from the given point A a straight line AL has been drawn equal to the given straight line BC . PROPOSITION III . PROBLEM . From the greater of two given straight lines to cut off a part equal ...
... straight line AL is equal to BC . Wherefore from the given point A a straight line AL has been drawn equal to the given straight line BC . PROPOSITION III . PROBLEM . From the greater of two given straight lines to cut off a part equal ...
Página 13
... given rectilineal angle — that is , to divide it into two equal angles . Let ... straight line AF bisects the angle BAC . DA Because AD is equal to AE , and ... given rectilineal angle BAC is bisected by the straight line AF . PROPOSITION ...
... given rectilineal angle — that is , to divide it into two equal angles . Let ... straight line AF bisects the angle BAC . DA Because AD is equal to AE , and ... given rectilineal angle BAC is bisected by the straight line AF . PROPOSITION ...
Página 14
... straight line AB is divided into two equal parts in the point D. PROPOSITION XI . PROBLEM . To draw a straight line at right angles to a given straight line , from a given point in the same . Let AB be a given straight line , and C a point ...
... straight line AB is divided into two equal parts in the point D. PROPOSITION XI . PROBLEM . To draw a straight line at right angles to a given straight line , from a given point in the same . Let AB be a given straight line , and C a point ...
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Elements of Plane Geometry According to Euclid Robert Simson,Formerly Chairman Department of Immunology John Playfair,John Playfair Sin vista previa disponible - 2016 |
Términos y frases comunes
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 opposite angle parallel parallelogram perimeter perpendicular polygon porism produced proportional PROPOSITION radius rectangle AB BC 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
Pasajes populares
Página 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.
Página 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.
Página 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.
Página 4 - If two triangles have two sides of the one equal to two sides of the...
Página 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.
Página 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.
Página 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.
Página 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.
Página 27 - Parallelograms upon equal bases, and between the same parallels, are equal to one another.
Página 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.