Elements of Geometry: Containing the First Six Books of Euclid: With a Supplement on the Quadrature of the Circle and the Geometry of Solids ...J. Eastburn & Company, 1819 - 317 páginas |
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Página 89
... circle , and D the given rectilineal angle ; it is required to cut off a segment from the circle ABC that shall con- tain an angle equal to the angle D. Draw ( 17. 3. ) the straight line EF touching the circle ABC in the A C point B ...
... circle , and D the given rectilineal angle ; it is required to cut off a segment from the circle ABC that shall con- tain an angle equal to the angle D. Draw ( 17. 3. ) the straight line EF touching the circle ABC in the A C point B ...
Página 90
... 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 cir- cle , is equal to the square of the ...
... 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 cir- cle , is equal to the square of the ...
Página 91
... circle ABC , take ( 1. 3. ) the centre E , and draw EF perpendicular ( 12 . 1. ) to AC , and join EB , EC , ED : and ... touches the circle . A EF C B PROP . XXXVII . THEOR . If from a point OF GEOMETRY . BOOK III . 91.
... circle ABC , take ( 1. 3. ) the centre E , and draw EF perpendicular ( 12 . 1. ) to AC , and join EB , EC , ED : and ... touches the circle . A EF C B PROP . XXXVII . THEOR . If from a point OF GEOMETRY . BOOK III . 91.
Página 92
... circle there be drawn two straight lines , one of which cuts the circle , and the other meets it ; if the rectangle ... touches the circle . Draw ( 17. 3. ) the straight line DE touching the circle ABC ; find the centre F , and ...
... circle there be drawn two straight lines , one of which cuts the circle , and the other meets it ; if the rectangle ... touches the circle . Draw ( 17. 3. ) the straight line DE touching the circle ABC ; find the centre F , and ...
Página 93
... circle , when all the angles of the inscrib- ed figure are upon the circumference of the circle . IV . A rectilineal figure is said to be described about a circle , when each side of the cir- cumscribed figure touches ... circle . V. In ...
... circle , when all the angles of the inscrib- ed figure are upon the circumference of the circle . IV . A rectilineal figure is said to be described about a circle , when each side of the cir- cumscribed figure touches ... circle . V. In ...
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Términos y frases comunes
ABC is equal ABCD altitude angle ABC angle ACB angle BAC arch AC base BC bisected centre circle ABC circumference common section cosine cylinder demonstrated diameter draw equal and similar equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle fore four right angles given straight line greater hypotenuse inscribed join less Let ABC Let the straight line BC magnitudes meet opposite angle parallel parallelogram perpendicular polygon prism produced proportionals proposition Q. E. D. COR Q. E. D. PROP radius ratio rectangle contained rectilineal figure remaining angle segment semicircle shewn side BC sine solid angle solid parallelepipeds spherical angle spherical triangle SPHERICAL TRIGONOMETRY straight line AC THEOR third touches the circle triangle ABC triangle DEF wherefore
Pasajes populares
Página 153 - If from the vertical angle of a triangle a straight line be drawn perpendicular to the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the perpendicular and the diameter of the circle...
Página 19 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Página 33 - THE greater angle of every triangle is subtended by the greater side, or has the greater side opposite to it.
Página 292 - 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 308 - 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 36 - IF two triangles have two sides of the one equal to two sides of the other, each to each, but the angle contained by the two sides of one of them greater than the angle contained by the two sides equal to them, of the other ; the base of that which has the greater angle shall be greater than the base of the other.
Página 18 - 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 78 - To draw a straight line from a given point, either without or in the circumference, which shall touch a given circle. First, let A be a given point without the given circle BCD : it is required to draw a straight line from A which shall touch the circle.
Página 77 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of it, falls without the circle...
Página 39 - If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the too interior angles upon the same side together equal to two right angles.