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 Trigonometry |
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Seite 8
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, ... Poft . lines , CA , CB to the points A , B : ABC shall be an equilateral triangle .
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, ... Poft . lines , CA , CB to the points A , B : ABC shall be an equilateral triangle .
Seite 10
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of ... N. Let ABC , DEF be two triangles which have the two sides AB , AC equal to the two sides DE , DF , each to each , viz .
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of ... N. Let ABC , DEF be two triangles which have the two sides AB , AC equal to the two sides DE , DF , each to each , viz .
Seite 12
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of Solids; ... Book I. whole ACF , and the part CBG to the part BCF , the te . maining artgle ABC is therefore equal to the ...
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of Solids; ... Book I. whole ACF , and the part CBG to the part BCF , the te . maining artgle ABC is therefore equal to the ...
Seite 18
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of ... Again , the angle DBA is equal to the two angles DBE , EBA ; add to each of these equals the angle ABC ; then will the ...
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of ... Again , the angle DBA is equal to the two angles DBE , EBA ; add to each of these equals the angle ABC ; then will the ...
Seite 19
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of Solids; ... upon one side of it , the angles ABC , ABE are together equal a to two right angles ; but the angles ABC , a 13.
Containing the First Six Books of Euclid, with a Supplement on the Quadrature of the Circle and the Geometry of Solids; ... upon one side of it , the angles ABC , ABE are together equal a to two right angles ; but the angles ABC , a 13.
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ABCD alſo altitude angle ABC angle BAC arch baſe becauſe biſected Book called caſe centre circle circle ABC circumference coincide common cylinder definition demonſtrated deſcribed diameter difference divided draw drawn equal equal angles equiangular Euclid extremity fall fame fides firſt folid fore four fourth given given ſtraight line greater half inſcribed join leſs Let ABC magnitudes meet multiple muſt oppoſite parallel parallelogram perpendicular plane polygon priſm produced PROP proportionals propoſition proved radius ratio rectangle contained remaining right angles ſame ſame reaſon ſecond ſegment ſhall ſides ſimilar ſin ſince ſolid ſpherical ſquare ſtraight line ſuch ſum taken tangent THEOR theſe thing third thoſe touches triangle ABC wherefore whole
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Seite 27 - 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...
Seite 172 - 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.
Seite 42 - The complements of the parallelograms, which are about the diameter of any parallelogram, are equal to one another.
Seite 84 - 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...
Seite 106 - IF from a point without a circle there be drawn two straight lines, one of which cuts the circle, and the other meets it ; if the rectangle contained by the whole line which cuts the circle, and the part of it without the circle be equal to the square of the line which meets it, the line which meets shall touch the circle.
Seite 22 - THE greater angle of every triangle is subtended by the greater side, or has the greater side opposite to it. Let ABC be a triangle, of which the angle ABC is greater than the angle BCA : the side AC is likewise greater than the side AB. For, if it be not greater, AC must...
Seite 64 - If then the sides of it, BE, ED are equal to one another, it is a square, and what was required is now done: But if they are not equal, produce one of them BE to F, and make EF equal to ED, and bisect BF in G : and from the centre G, at the distance GB, or GF, describe the semicircle...
Seite 166 - IN a right angled triangle, if a perpendicular be drawn from the right angle to the base, the triangles on each side of it are similar to the whole triangle, and to one another. Let ABC be a right angled triangle, having the right angle BAC ; and from the point A let AD be drawn perpendicular to the base BC : the triangles ABD, ADC are similar to the whole triangle ABC, and to one another.
Seite 54 - If a straight line be bisected, and produced to any point ; the rectangle contained by the whole line thus produced, and the part of it produced...
Seite 2 - 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.