Elements of Geometry: Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle, and the Geometry of Solids. To which are Added, Elements of Plane and Sperical TrigonometryW.E. Dean, 1844 - 317 sider |
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Resultat 1-5 av 79
Side 8
... meet together , but are not in the same straight line . D B E N. B. ' When several angles are at one point B , any one of them is ex- ' pressed by three letters , of which the letter that is at the vertex of the an- ' gle , that is , at ...
... meet together , but are not in the same straight line . D B E N. B. ' When several angles are at one point B , any one of them is ex- ' pressed by three letters , of which the letter that is at the vertex of the an- ' gle , that is , at ...
Side 11
... meet . POSTULATES . 1. 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 ...
... meet . POSTULATES . 1. 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 ...
Side 27
... meet to- wards B , D. In like manner it may be demonstrated that they do not meet towards A , C ; but those straight lines which meet . neither way , though produced ever so far , are parallel ( 30. Def . ) A E B G C F D to one another ...
... meet to- wards B , D. In like manner it may be demonstrated that they do not meet towards A , C ; but those straight lines which meet . neither way , though produced ever so far , are parallel ( 30. Def . ) A E B G C F D to one another ...
Side 28
... meet on the side of EF on which the two angles are that are less than two right angles . For , if not , KL and CD are either parallel , or they meet on the other side of EF ; but they are not parallel ; for the angles KGH , GHC would ...
... meet on the side of EF on which the two angles are that are less than two right angles . For , if not , KL and CD are either parallel , or they meet on the other side of EF ; but they are not parallel ; for the angles KGH , GHC would ...
Side 29
... meet towards L and D , they must meet if produced towards K and C. COR . 2. If BGH is a right angle , GHD will be a right angle also ; therefore every line perpendicular to one of two parallels , is perpendicular to the other . COR . 3 ...
... meet towards L and D , they must meet if produced towards K and C. COR . 2. If BGH is a right angle , GHD will be a right angle also ; therefore every line perpendicular to one of two parallels , is perpendicular to the other . COR . 3 ...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ... John Playfair Uten tilgangsbegrensning - 1839 |
Vanlige uttrykk og setninger
ABC is equal ABCD adjacent angles altitude angle ABC angle ACB angle BAC base BC bisected centre chord circle ABC circumference cosine cylinder demonstrated described diameter divided draw equal and similar equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle fore four right angles given rectilineal given straight line greater Hence hypotenuse inscribed join less Let ABC magnitudes meet multiple opposite angle parallel parallelogram parallelopiped perpendicular polygon prism PROB PROP proportional proposition quadrilateral radius ratio rectangle contained rectilineal figure remaining angle right angled triangle SCHOLIUM segment semicircle shewn side BC sine solid angle solid parallelopiped spherical angle spherical triangle square straight line BC THEOR touches the circle triangle ABC triangle DEF wherefore
Populære avsnitt
Side 95 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Side 68 - THE angles in the same segment of a circle are equal to one another...
Side 23 - Straight lines which are parallel to the same straight line are parallel to one another. Triangles and Rectilinear Figures. The sum of the angles of a triangle is equal to two right angles.
Side 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.
Side 78 - IF from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, shall be equal to the square of the line which touches it.
Side 9 - 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.
Side 75 - If a straight line touch a circle, and from the point of contact a...
Side 18 - 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...
Side 134 - EQUIANGULAR parallelograms have to one another the ratio which is compounded of the ratios of their sides.
Side 136 - AB is (7. 5.) to AD, as AE to AG ; and DC to CB, as GF to FE; and also CD to DA, as FG to GA ; therefore the sides of the parallelograms ABCD, AEFG about the equal angles are proportionals; and they are therefore similar to one another (1.