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 TrigonometryW. E. Dean, 1835 - 316 páginas |
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Página 5
... centre of the circle . 13. A diameter of a circle is a straight line drawn through the centre , and terminated both ways by the circumference . 14. A semicircle is the figure contained by a diameter and the part of the circumference cut ...
... centre of the circle . 13. A diameter of a circle is a straight line drawn through the centre , and terminated both ways by the circumference . 14. A semicircle is the figure contained by a diameter and the part of the circumference cut ...
Página 7
... centre , at any distance from that centre . AXIOMS . 1. THINGS which are equal to the same OF GEOMETRY . BOOK I. 7.
... centre , at any distance from that centre . AXIOMS . 1. THINGS which are equal to the same OF GEOMETRY . BOOK I. 7.
Página 32
... centre A , at the dis- tance AB , describe ( 3. Postulate ) the circle BCD , and from the cen- tre B , at the distance BA , describe the circle ACE ; and from the point C , in which the circles cut one another , draw the straight lines ...
... centre A , at the dis- tance AB , describe ( 3. Postulate ) the circle BCD , and from the cen- tre B , at the distance BA , describe the circle ACE ; and from the point C , in which the circles cut one another , draw the straight lines ...
Página 33
... centre A , and at the distance AD , describe ( 3. Post . ) the circle DEF ; and because A is the centre of the circle DEF , AE is equal to AD ; but the straight line C is likewise equal to AD ; whence AE and D A E B Care each of them ...
... centre A , and at the distance AD , describe ( 3. Post . ) the circle DEF ; and because A is the centre of the circle DEF , AE is equal to AD ; but the straight line C is likewise equal to AD ; whence AE and D A E B Care each of them ...
Página 35
... centre C , at the distance CD , describe ( 3 . Post . ) the circle EGF meeting AB in F , G : and bisect ( Prob . 5 ... centre F , at the distance FD , describe ( 3. Post . ) the cir- cle DKL ; and from the centre K F G H L 4A0 B C C- G ...
... centre C , at the distance CD , describe ( 3 . Post . ) the circle EGF meeting AB in F , G : and bisect ( Prob . 5 ... centre F , at the distance FD , describe ( 3. Post . ) the cir- cle DKL ; and from the centre K F G H L 4A0 B C C- G ...
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Términos y frases comunes
ABC is equal ABCD adjacent angles altitude angle ABC angle ACB angle BAC angles equal arc AC base BC bisected centre chord circle ABC circumference cosine cylinder demonstrated diameter divided draw Prob 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 Let the straight magnitudes meet multiple opposite angle parallel parallelogram parallelopiped perpendicular plane polygon prism PROP proposition quadrilateral radius ratio rectangle contained rectilineal figure remaining angle SCHOLIUM segment semicircle shewn side BC sine solid angle solid parallelopiped spherical angle spherical triangle square straight line BC THEOR third touches the circle triangle ABC triangle DEF wherefore
Pasajes populares
Página 46 - 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 39 - To describe a parallelogram that shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Página 47 - 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 on the line between the points of section, is equal to the square on half the line.
Página 25 - 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.
Página 5 - 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 75 - 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 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...
Página 294 - 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 52 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square of the side subtending the obtuse angle, is greater than the squares of the sides containing the obtuse angle, by twice the rectangle contained by the side upon which, when produced, the perpendicular falls, and the straight line intercepted without the triangle, between the perpendicular and the obtuse angle. Let ABC be an obtuse-angled triangle, having the obtuse angle...
Página 134 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides.