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 Spherical TrigonometryJ.P. Lippincott & Company, 1855 - 318 páginas |
Dentro del libro
Resultados 1-5 de 100
Página 9
... Spherical Trigonometry John Playfair. BD , is named the angle ABD , or DBA ; and that which is contained by ' BD , CB , is called the angle DBC , or CBD ; but , if there be only one an- ' gle at a point , it may be expressed by a letter ...
... Spherical Trigonometry John Playfair. BD , is named the angle ABD , or DBA ; and that which is contained by ' BD , CB , is called the angle DBC , or CBD ; but , if there be only one an- ' gle at a point , it may be expressed by a letter ...
Página 14
... Spherical Trigonometry John Playfair. coinciding with DE , AC shall coincide with DF , because the angle BAC is equal to the angle EDF ; wherefore also the point C shall coincide with the point F , because AC is equal to DF : But the ...
... Spherical Trigonometry John Playfair. coinciding with DE , AC shall coincide with DF , because the angle BAC is equal to the angle EDF ; wherefore also the point C shall coincide with the point F , because AC is equal to DF : But the ...
Página 15
... Spherical Trigonometry John Playfair. base of the triangle ABC : And it has also been proved that the angle FBC is equal to the angle GCB , which are the angles upon the other side of the base . COROLLARY . Hence every equilateral ...
... Spherical Trigonometry John Playfair. base of the triangle ABC : And it has also been proved that the angle FBC is equal to the angle GCB , which are the angles upon the other side of the base . COROLLARY . Hence every equilateral ...
Página 16
... Spherical Trigonometry John Playfair. but it has been demonstrated to be greater than it ; which is impossi ble . E F ... angle ECD is greater than the angle BCD ; wherefore the angle FDC is likewise greater than BCD ; much more then is ...
... Spherical Trigonometry John Playfair. but it has been demonstrated to be greater than it ; which is impossi ble . E F ... angle ECD is greater than the angle BCD ; wherefore the angle FDC is likewise greater than BCD ; much more then is ...
Página 17
... Spherical Trigonometry John Playfair. the same tion , as EG and FG ; then , upon the same base EF , and upon side of ... angle BAC coincides with the angle EDF , and is equal ( 8. Ax . ) to it . PROP . IX . PROB . To bisect a given ...
... Spherical Trigonometry John Playfair. the same tion , as EG and FG ; then , upon the same base EF , and upon side of ... angle BAC coincides with the angle EDF , and is equal ( 8. Ax . ) to it . PROP . IX . PROB . To bisect a given ...
Otras ediciones - Ver todas
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 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 rectilineal given straight line greater Hence hypotenuse inscribed join less Let ABC line BC magnitudes meet opposite angle parallel parallelogram parallelopiped perpendicular plane 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 spherical angle spherical triangle square straight line AC THEOR third touches the circle triangle ABC triangle DEF wherefore
Pasajes populares
Página 41 - If a straight line be divided into two equal parts, and also into two unequal parts; the rectangle contained by the unequal parts, together with the square of the line between the points of section, is equal to the square of half the line.
Página 70 - 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 45 - Again, because the angle at B is half a right angle, and FDB a right angle, for it is equal...
Página 91 - 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...
Página 273 - If a straight line meet 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 25 - Parallelograms upon the same base and between the same parallels, are equal to one another.
Página 130 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides.
Página 61 - THE diameter is the greatest straight line in a circle; and, of all others, that which is nearer to the centre is always greater than one more remote ; and the greater is nearer to the centre than the less.* Let ABCD be a circle, of which...