Elements of Geometry and Conic SectionsHarper, 1849 - 226 σελίδες |
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Αποτελέσματα 1 - 5 από τα 51.
Σελίδα 10
... less than a right angle . An obtuse angle is one which is greater than a right angle . 12. Parallel straight lines are such as are in the same plane , and which , being produced ever so far both ways , do not meet . 13. A plane figure ...
... less than a right angle . An obtuse angle is one which is greater than a right angle . 12. Parallel straight lines are such as are in the same plane , and which , being produced ever so far both ways , do not meet . 13. A plane figure ...
Σελίδα 14
... less than BCK . But BCK is less than BCD ( Axiom 9 ) ; much more , then , is ACD less than BCD , which is impossible , because the angle ACD is equal to the angle BCD ( Def . 10 ) ; therefore , GH can not but coincide with CD , and the ...
... less than BCK . But BCK is less than BCD ( Axiom 9 ) ; much more , then , is ACD less than BCD , which is impossible , because the angle ACD is equal to the angle BCD ( Def . 10 ) ; therefore , GH can not but coincide with CD , and the ...
Σελίδα 16
... less to the greater , which is impossible . Hence BE is not in the same straight line with BC ; and in like manner , it may be proved that no other can be in the same straight line with it but BD . Therefore , if at a point , & c ...
... less to the greater , which is impossible . Hence BE is not in the same straight line with BC ; and in like manner , it may be proved that no other can be in the same straight line with it but BD . Therefore , if at a point , & c ...
Σελίδα 19
... less than the sum of AB and AC ; and AC less than the sum of AB and BC . Therefore , any two sides , & c . PROPOSITION IX . THEOREM . If , from a point within a triangle , two straight lines are drawn to the extremities of either side ...
... less than the sum of AB and AC ; and AC less than the sum of AB and BC . Therefore , any two sides , & c . PROPOSITION IX . THEOREM . If , from a point within a triangle , two straight lines are drawn to the extremities of either side ...
Σελίδα 20
... less , and join CD . Then , because in the tri- angles DBC , ACB , DB is equal to AC , and BC is common to both triangles , also , by supposition , the angle DBC is equal to the angle ACB ; therefore , the triangle DBC is equal to the ...
... less , and join CD . Then , because in the tri- angles DBC , ACB , DB is equal to AC , and BC is common to both triangles , also , by supposition , the angle DBC is equal to the angle ACB ; therefore , the triangle DBC is equal to the ...
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ELEMENTS OF GEOMETRY & CONIC S Elias 1811-1889 Loomis,Making of America Project Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
75 cents ABCD AC is equal allel altitude angle ABC angle ACB angle BAC Anthon's base BCDEF bisected chord circle circumference cone contained convex surface curve described diameter dicular draw drawn ellipse equal angles equal to AC equally distant equiangular equivalent exterior angle foci four right angles frustum greater Hence Prop hyperbola inscribed intersection join latus rectum Let ABC lines AC major axis mean proportional measured by half meet Muslin number of sides ordinate parabola parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN principal vertex prism PROPOSITION pyramid radii radius ratio rectangle regular polygon right angles Prop Scholium segment Sheep extra side AC similar slant height solid angle sphere spherical triangle square subtangent tangent THEOREM triangle ABC vertex vertices
Δημοφιλή αποσπάσματα
Σελίδα 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
Σελίδα 27 - VIf 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...
Σελίδα 11 - A rhombus, is that which has all its sides equal, but its angles are not right angles.
Σελίδα 63 - IF a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the' rectangle contained by the parts.
Σελίδα 18 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Σελίδα 10 - 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.
Σελίδα 15 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Σελίδα 17 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Σελίδα 148 - I.), that every section of a sphere made by a plane is a circle.