The Eclectic School Geometry: A Revision of Evan's School GeometryVan Antwerp, Bragg, 1884 - 155 páginas |
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Página 13
... line may be drawn between any two points . 9. An hypothesis denotes the supposition made , or the conditions given ... line intersect two parallels . The con- clusion relates to the sum of certain angles . We shall have the converse of this ...
... line may be drawn between any two points . 9. An hypothesis denotes the supposition made , or the conditions given ... line intersect two parallels . The con- clusion relates to the sum of certain angles . We shall have the converse of this ...
Página 19
... line , their sum is two right angles . Cor . 2. At a given point , C , but one perpendicular can be erected to the line AB ( ? ) . ( See Def . 3. ) AB ( ? ) . THEOREM II . If two straight lines cut one another , the opposite or ver ...
... line , their sum is two right angles . Cor . 2. At a given point , C , but one perpendicular can be erected to the line AB ( ? ) . ( See Def . 3. ) AB ( ? ) . THEOREM II . If two straight lines cut one another , the opposite or ver ...
Página 20
... line SN drawn parallel to AB . GHN = EGB ( ? ) . Cor . 2. - If two angles have their sides parallel , each to each , and directed the same way from the vertex , they are equal . A E B A and B are the given angles . Prolong the line DB ...
... line SN drawn parallel to AB . GHN = EGB ( ? ) . Cor . 2. - If two angles have their sides parallel , each to each , and directed the same way from the vertex , they are equal . A E B A and B are the given angles . Prolong the line DB ...
Página 22
... given point , is represented numerically by 360 ° . Hence , one right angle is equal to 90 ° . THEOREM VI . If the adjacent angles , made by one straight line with two others , are together equal to two right angles , these two lines ...
... given point , is represented numerically by 360 ° . Hence , one right angle is equal to 90 ° . THEOREM VI . If the adjacent angles , made by one straight line with two others , are together equal to two right angles , these two lines ...
Página 23
... line than CB as the prolongation of AC . This error will not appear when we assume CB as the prolongation of AC ... given line , the perpendicular is shorter than any oblique line . BH is a perpendicular and BC an oblique line from B to ...
... line than CB as the prolongation of AC . This error will not appear when we assume CB as the prolongation of AC ... given line , the perpendicular is shorter than any oblique line . BH is a perpendicular and BC an oblique line from B to ...
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Términos y frases comunes
allel altitude apothegm Axiom Bisect the angles Book chord circle circumference coincide cone construction convex surface diagonal diameter diedral divided draw drawn equal Theo equal to half equally distant equilateral triangle equivalent exterior angle figure frustum Geometry given angle given line given point given straight line half the product Hence hexagon homologous sides hypotenuse hypothesis inscribed inscribed angle intersection isosceles Let ABC measured by half mutually equiangular number of equal number of sides parallel parallelogram parallelopiped pendicular perimeter perpendicular plane polyedron prism Prove pyramid quadrilateral Ques radii radius ratio rectangle regular polygon respectively equal right angles right-angled triangle secant segment slant height sphere square tangent tetraedron THEOREM THEOREM XI third trapezoid trian triangles ABC triedral vertex
Pasajes populares
Página 104 - If from a point without a circle, a tangent and a secant be drawn, the tangent will be a mean proportional between the secant and its external segment.
Página 32 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Página 54 - The circumference of every circle is supposed to' be divided into 360 equal parts, called degrees ; each degree into 60 minutes, and each minute into 60 seconds. Degrees, minutes, and seconds are designated by the characters °, ', ". Thus 23° 14' 35" is read 23 degrees, 14 minutes, and 35 seconds.
Página 42 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Página 107 - The areas of two circles are to each other as the squares of their radii. For, if S and S' denote the areas, and R and R
Página 147 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles.
Página 140 - A cone is a solid figure described by the revolution of a right-angled triangle about one of the sides containing the right angle, which side remains fixed.
Página 50 - The area of a regular polygon is equal to half the product of its apothem and perimeter.
Página 141 - The altitude of a pyramid or cone is the perpendicular distance from the ve~rtex to the base.
Página 39 - The area of a rectangle is equal to the product of its base and altitude.