An Elementary Geometry: Plane, Solid and Spherical1880 - 240 σελίδες |
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Σελίδα 4
... vertex ; and the lines A B , B C , the sides of the angle . B A If there is but one angle , it can be designated by the letter at its vertex , as the angle B ; but when a number of angles have the same vertex , each angle is designated ...
... vertex ; and the lines A B , B C , the sides of the angle . B A If there is but one angle , it can be designated by the letter at its vertex , as the angle B ; but when a number of angles have the same vertex , each angle is designated ...
Σελίδα 15
... vertex bisecting the base . 4. Drawn from the vertex perpendicular to the base . 5. Drawn from the vertex bisecting the triangle . 6. Bisecting the triangle and the base . 7. Bisecting the triangle and perpendicular to the base . 84 ...
... vertex bisecting the base . 4. Drawn from the vertex perpendicular to the base . 5. Drawn from the vertex bisecting the triangle . 6. Bisecting the triangle and the base . 7. Bisecting the triangle and perpendicular to the base . 84 ...
Σελίδα 16
... vertex D will be on the side of A C , opposite to B , and the side C D adjacent to its equal CB . Join B D. Since by hypothesis A B = AD , ABD is an isosceles triangle ; and the angle A B D = AD B ( 82 ) ; also , since B C C D , B C D ...
... vertex D will be on the side of A C , opposite to B , and the side C D adjacent to its equal CB . Join B D. Since by hypothesis A B = AD , ABD is an isosceles triangle ; and the angle A B D = AD B ( 82 ) ; also , since B C C D , B C D ...
Σελίδα 23
... sides of the triangle ABC intersect at the same point 0 . 108. Corollary . The point O is equally distant from all the vertices of the triangle ABC . QUADRILATERALS . DEFINITIONS . 109. A Trapezium is a quadrilateral BOOK I. 23.
... sides of the triangle ABC intersect at the same point 0 . 108. Corollary . The point O is equally distant from all the vertices of the triangle ABC . QUADRILATERALS . DEFINITIONS . 109. A Trapezium is a quadrilateral BOOK I. 23.
Σελίδα 24
... Rhombus is an equilateral rhomboid ; as U V W X. X W 116. A Diagonal is a line joining the vertices of two angles . not adjacent ; as DB . THEOREM XXIV . 117. In a parallelogram the opposite sides 24 PLANE GEOMETRY .
... Rhombus is an equilateral rhomboid ; as U V W X. X W 116. A Diagonal is a line joining the vertices of two angles . not adjacent ; as DB . THEOREM XXIV . 117. In a parallelogram the opposite sides 24 PLANE GEOMETRY .
Άλλες εκδόσεις - Προβολή όλων
An Elementary Geometry: Plane, Solid and Spherical William Frothingham Bradbury Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
A B D altitude angles are equal apothem arcs A B centre chord circle circumference circumscribed cone construct the triangle convex surface Corollary diagonals diameter diedral angles distance divided draw equally distant equivalent bases face angles feet frustum given angle given line given point hence homologous homologous lines hypothenuse inscribed intersection isosceles triangle lines bisecting locus medial line middle points mutually equiangular number of sides opposite sides parallelogram parallelopiped perimeter perpendicular plane M N polar triangle polyedral angle polyedrons produced proposition quadrilateral radius ratio rectangle rectangular parallelopiped regular polygon respectively equal right prism right triangle Scholium similar slant height sphere spherical angle spherical polygon spherical triangle square straight line tangent tetraedrons THEOREM triangle A B C triangle is equal triangular prism triedral vertex vertices
Δημοφιλή αποσπάσματα
Σελίδα 166 - Any two rectangles are to each other as the products of their bases by their altitudes.
Σελίδα 13 - If two triangles have two sides and the inchtded angle of the one respectively equal to two sides and the included angle of the other, the two triangles are equal in all respects.
Σελίδα 41 - If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d...
Σελίδα 198 - Each side of a spherical triangle is less than the sum of the other two sides.
Σελίδα 75 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Σελίδα 203 - In an isosceles spherical triangle, the angles opposite the equal sides are equal. In the spherical triangle ABC, let AB equal AC.
Σελίδα 220 - If one angle of a triangle is equal to the sum of the other two, the triangle can be divided into two isosceles triangles.
Σελίδα 136 - A STRAIGHT line is perpendicular to a plane, when it is perpendicular to every straight line which it meets in that plane.
Σελίδα 199 - THEOREM. The sum of the sides of a spherical polygon is less than the circumference of a great circle.
Σελίδα 162 - An oblique prism is equivalent to a right prism whose base is a right section of the oblique prism, and whose altitude is equal to a lateral edge of the oblique prism. Hyp. GM is a right section of oblique prism AD', and GM.' a right prism whose altitude is equal to a lateral edge of AD'. To prove AD' =0= GM'. Proof. The lateral edges of GM