Plane and Solid Geometry |
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Αποτελέσματα 1 - 5 από τα 23.
Σελίδα 2
Solid Geometry treats of figures which are not plane . 16 . When one figure can
be placed upon another so that each point of the one lies upon the
corresponding point of the other , the figures are said to coincide . 17 . Equal
magnitudes are ...
Solid Geometry treats of figures which are not plane . 16 . When one figure can
be placed upon another so that each point of the one lies upon the
corresponding point of the other , the figures are said to coincide . 17 . Equal
magnitudes are ...
Σελίδα 3
From the definition of a straight line it appears that ( a ) two straight lines of
unlimited length , coinciding in part , coincide throughout , ( 6 ) two straight lines
can intersect only once , and ( c ) two points determine a straight line . The
expression ...
From the definition of a straight line it appears that ( a ) two straight lines of
unlimited length , coinciding in part , coincide throughout , ( 6 ) two straight lines
can intersect only once , and ( c ) two points determine a straight line . The
expression ...
Σελίδα 9
Apply 2 DEF to Z ABC so that the vertex E coincides with the vertex B , and ED
coincides with BA . Then EF will fall on BC ( straight lines coinciding in part
coincide throughout ) . Hence ZDEF = 2 ABC . Q . E . D . 53 . All right angles are
equal .
Apply 2 DEF to Z ABC so that the vertex E coincides with the vertex B , and ED
coincides with BA . Then EF will fall on BC ( straight lines coinciding in part
coincide throughout ) . Hence ZDEF = 2 ABC . Q . E . D . 53 . All right angles are
equal .
Σελίδα 12
B Hyp . In triangles ABC and A ' B ' C ' , AB = A ' B ' , ZA = L A ' , and ZB = ZB ' . To
prove A ABC = A A ' B ' C ' . Proof . Apply A ABC to A A ' B ' C ' so that AB shall
coincide with A ' B ' . BC will take the direction of B ' C " 12 PLANE GEOMETRY.
B Hyp . In triangles ABC and A ' B ' C ' , AB = A ' B ' , ZA = L A ' , and ZB = ZB ' . To
prove A ABC = A A ' B ' C ' . Proof . Apply A ABC to A A ' B ' C ' so that AB shall
coincide with A ' B ' . BC will take the direction of B ' C " 12 PLANE GEOMETRY.
Σελίδα 13
A ABC and A ' B ' C ' coincide : : A ABC = A A ' B ' C ' . Q . E . D . 69 . Note . — This
method of proof ( superposition ) is employed in fundamental propositions only .
The student should place those parts upon each other whose equality is known ...
A ABC and A ' B ' C ' coincide : : A ABC = A A ' B ' C ' . Q . E . D . 69 . Note . — This
method of proof ( superposition ) is employed in fundamental propositions only .
The student should place those parts upon each other whose equality is known ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD altitude angle angles are equal base bisect bisector called chord circle circumference circumscribed coincide common cone construct contains corresponding cylinder diagonals diameter diedral angles difference distance divide draw drawn equal equidistant equivalent exterior angle faces figure Find formed four frustum geometrical given circle given line given point greater Hence homologous hypotenuse inches included inscribed intersecting isosceles triangle lateral edges length less limit line joining measured median meet midpoints opposite sides parallel parallel lines parallelogram passing perimeter perpendicular plane polyedron polygon prism PROBLEM Proof PROPOSITION prove pyramid quadrilateral radii radius ratio rectangle regular polygon respectively right angles right triangle School segments sides similar sphere spherical triangle square straight line surface tangent THEOREM third transform triangle triangle are equal vertex vertices
Δημοφιλή αποσπάσματα
Σελίδα 45 - If two triangles have two sides of one equal respectively to two sides of the other, but the included angle of the first triangle greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Σελίδα 119 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 180 - 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. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.
Σελίδα 31 - The median to the base of an isosceles triangle is perpendicular to the base.
Σελίδα 305 - A cylinder is a solid bounded by a cylindrical surface and two parallel planes; the bases of a cylinder are the parallel planes; and the lateral surface is the cylindrical surface.
Σελίδα 337 - A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles. The bounding arcs are the sides of the polygon ; the...
Σελίδα 250 - A straight line perpendicular to one of two parallel planes is perpendicular to the other also.
Σελίδα 297 - A truncated triangular prism is equivalent to the sum of three pyramids whose common base is the base of the prism, and whose vertices are the three vertices of the inclined section.
Σελίδα 105 - I. When the given point, A, is in the circumference. HINT. — What is the angle formed by a radius and a tangent at its extremity ? II. When the given point, A, is without the circle. \ Construction. Join A, and 0 the center of the given circle. On OA as a diameter, construct a circumference, intersecting the given circumference in B and C.
Σελίδα 276 - 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 OM ' a right prism whose altitude is equal to a lateral edge of AD'. To prove AD' =s= GM'. Proof. The lateral edges of GM