Elements of Geometry: Containing the First Six Books of Euclid: With a Supplement ... to which are Added, Elements of Plane and Sphericale Trigonometry ... From the Last London Ed., EnlJ.B. Lippincott & Company, 1855 - 317 páginas |
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Página 6
... right angled triangle is that which has a right angle . 23. An obtuse angled triangle is that which has an obtuse angle . 24 An acute angled triangle is that which has three acute angles . 25 Of four sided figures , a square is that ...
... right angled triangle is that which has a right angle . 23. An obtuse angled triangle is that which has an obtuse angle . 24 An acute angled triangle is that which has three acute angles . 25 Of four sided figures , a square is that ...
Página 7
... angles right angles . 29. All other four sided figures besides these , are called trapeziums . 30. Parallel straight lines are such as are in the same plane , and which being produced ever so far both ways , do not meet . POSTULATES . 1 ...
... angles right angles . 29. All other four sided figures besides these , are called trapeziums . 30. Parallel straight lines are such as are in the same plane , and which being produced ever so far both ways , do not meet . POSTULATES . 1 ...
Página 11
... angles right angles . 29. All other four sided figures besides these , are called trapeziums . 30. Parallel straight lines are such as are in the same plane , and which being produced ever so far both ways , do not meet . POSTULATES . I ...
... angles right angles . 29. All other four sided figures besides these , are called trapeziums . 30. Parallel straight lines are such as are in the same plane , and which being produced ever so far both ways , do not meet . POSTULATES . I ...
Página 20
... right angles ; but the angles ABC , ABD are likewise together equal to two right angles · therefore the angles CBA ... four right angles . COR . 2. And hence , all the angles made by any number of straight liner meeting in one point ...
... right angles ; but the angles ABC , ABD are likewise together equal to two right angles · therefore the angles CBA ... four right angles . COR . 2. And hence , all the angles made by any number of straight liner meeting in one point ...
Página 28
... angles ; therefore AB is parallel ( 27. 1. ) to CD . Again , because the angles BGH , GHD are equal ( hyp . ) to two right ... four angles KGH , HGL , CHG , GHD are together equal to four right angles ( 13 1. ) of which the two , KGH , CHG ...
... angles ; therefore AB is parallel ( 27. 1. ) to CD . Again , because the angles BGH , GHD are equal ( hyp . ) to two right ... four angles KGH , HGL , CHG , GHD are together equal to four right angles ( 13 1. ) of which the two , KGH , CHG ...
Otras ediciones - Ver todas
Elements of Geometry; Containing the First Six Books of Euclid ... Euclid,John Playfair Vista completa - 1814 |
Términos y frases comunes
ABC is equal ABCD adjacent angles altitude angle ABC angle ACB angle BAC base BC bisected centre chord circle ABC circumference coincide cosine cylinder definition demonstrated described diameter divided draw equal and similar equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle fore four right angles given straight line greater Hence hypotenuse inscribed join less Let ABC magnitudes meet opposite angle parallel parallelogram parallelopiped perpendicular polygon prism PROB produced PROP proportional proposition quadrilateral radius ratio rectangle contained rectilineal figure remaining angle right angled triangle SCHOLIUM segment semicircle shewn side BC sine solid angle spherical angle spherical triangle square straight line BC THEOR third touches the circle triangle ABC triangle DEF wherefore
Pasajes populares
Página 3 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Página 122 - 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 74 - 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 44 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Página 5 - Let it be granted that a straight line may be drawn from any one point to any other point. 2. That a terminated straight line may be produced to any length in a straight line. 3. And that a circle may be described from any centre, at any distance from that centre.
Página 290 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Página 277 - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Página 143 - ... cuts the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the segments of the base, together with the square on the straight line which bisects the angle.
Página 7 - If two triangles have two sides of the one equal to two sides of the...
Página 26 - THE straight lines which join the extremities of two equal and parallel straight lines, towards the same parts, are also themselves equal and parallel. Let AB, CD be equal and parallel straight lines, and joined towards the same parts by the straight lines AC, BD ; AC, BD are also equal and parallel.