The Elements of Solid GeometryLeach, Shewell & Sanborn, 1893 - 95 σελίδες |
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Αποτελέσματα 1 - 5 από τα 9.
Σελίδα 12
... opposite to palm , that each is the image of the other . " 43. A triedral angle is a polyedral angle of three faces . PROPOSITION X. 44. THEOREM . Any face angle of a 12 THE ELEMENTS OF SOLID GEOMETRY . DEFINITIONS: POLYEDRAL ANGLES.
... opposite to palm , that each is the image of the other . " 43. A triedral angle is a polyedral angle of three faces . PROPOSITION X. 44. THEOREM . Any face angle of a 12 THE ELEMENTS OF SOLID GEOMETRY . DEFINITIONS: POLYEDRAL ANGLES.
Σελίδα 18
... opposite faces are parallel . ( b ) Any right section is a parallelogram . ( e ) All right sections are equal . 67 . A rectangular parallelopiped is a right prism whose bases are rectangles ; all the faces are therefore rectangles ( 64 ) ...
... opposite faces are parallel . ( b ) Any right section is a parallelogram . ( e ) All right sections are equal . 67 . A rectangular parallelopiped is a right prism whose bases are rectangles ; all the faces are therefore rectangles ( 64 ) ...
Σελίδα 24
... opposite edges of a parallelopiped divides it into two equiva- lent triangular prisms . D ' B ' H F D B Let the plane AC ' pass through the diagonally opposite edges AA ' and CC ' of the parallelopiped BD ' ; then will the triangular ...
... opposite edges of a parallelopiped divides it into two equiva- lent triangular prisms . D ' B ' H F D B Let the plane AC ' pass through the diagonally opposite edges AA ' and CC ' of the parallelopiped BD ' ; then will the triangular ...
Σελίδα 30
... of their bases . Use diagram of ( 98 ) for ( 99 ) . 100. THEOREM . The opposite faces of a parallelopiped are equal . D ' D B ' B 101. THEOREM . The diagonals of any parallelopiped bisect each 30 THE ELEMENTS OF SOLID GEOMETRY . EXERCISES.
... of their bases . Use diagram of ( 98 ) for ( 99 ) . 100. THEOREM . The opposite faces of a parallelopiped are equal . D ' D B ' B 101. THEOREM . The diagonals of any parallelopiped bisect each 30 THE ELEMENTS OF SOLID GEOMETRY . EXERCISES.
Σελίδα 60
... opposite A , in the polar tri- angle , then will A be equivalent to 180 ° B'C ' . - For , produce the arcs AB and AC until they meet B'C ' at some points D and E. or , But , ( a ) Now , arc B'E = 90 ° ( 179 ) . ( b ) And arc C'D ( c ) ...
... opposite A , in the polar tri- angle , then will A be equivalent to 180 ° B'C ' . - For , produce the arcs AB and AC until they meet B'C ' at some points D and E. or , But , ( a ) Now , arc B'E = 90 ° ( 179 ) . ( b ) And arc C'D ( c ) ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABC and DEF ABC-B altitude are equal axis base and altitude bases are equal bisecting centre circle circumference coincide common altitude common vertex conical surface COROLLARY cube cuboid DEFINITIONS diameter dicular diedral angle EDC-O equal with respect equivalent faces is called feet Find the volume frustum Hence inscribed prism intersection lateral edges lateral faces lateral surface Let the line line BA lune MN and PQ mutually equal O-ABCD oblique parallelopiped parallel planes parallelogram pass perimeter perpen perpendicular to MN plane angle plane MN plane PQ polar triangle polyedral angle prisms whose bases radii radius regular polyedrons regular polygon right angles right circular cone right prism right section SCHOLIUM sides slant height sphere spherical angle spherical excess spherical polygon spherical triangle straight line tetraedron THEOREM triangles ABC triangular prism triangular pyramids triedral
Δημοφιλή αποσπάσματα
Σελίδα 48 - Assuming that 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...
Σελίδα 46 - Similar cylinders are to each other as the cubes of their altitudes, or as the cubes of the diameters of their bases.
Σελίδα 4 - If a straight line is perpendicular to each of two other straight lines at their point of intersection, it is perpendicular to the plane of the two lines.
Σελίδα 49 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 94 - Two triangles are equal if two sides and the included angle of the one are equal respectively to two sides and the included angle of the other (sas = sas). Hyp. In A ABC and A'B'C', AB = A'B', BC = B'C', and Z B = Z B'.
Σελίδα 46 - The lateral areas, or the total -areas, of two similar cones of revolution are to each other as the squares of their altitudes...
Σελίδα 6 - Theorem: If a straight line is perpendicular to one of two parallel planes, it is perpendicular, also, to the other plane.
Σελίδα 9 - ... meeting the plane at unequal distances from the foot of the perpendicular the more remote is the greater.
Σελίδα 56 - A spherical angle is measured by the arc of a great circle described from its vertex as a pole, and included between its sides, produced if necessary.