Elements of Geometry and Conic SectionsHarper & Brothers, 1857 - 226 σελίδες |
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Αποτελέσματα 1 - 5 από τα 51.
Σελίδα 10
... 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 is a plane terminated on all sides by lines either straight ...
... 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 is a plane terminated on all sides by lines either straight ...
Σελίδα 12
... greater than any of its parts . 10. The whole is equal to the sum of all its parts . 11. From one point to another only one straight line can be drawn . 12. Two straight lines , which intersect one another , 12 GEOMETRY .
... greater than any of its parts . 10. The whole is equal to the sum of all its parts . 11. From one point to another only one straight line can be drawn . 12. Two straight lines , which intersect one another , 12 GEOMETRY .
Σελίδα 16
... 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 . X PROPOSITION IV ...
... 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 . X PROPOSITION IV ...
Σελίδα 20
... greater , and from it cut off DB equal to AC the less , and join CD . Then , because in the tri- angles DBC , ACB ... greater side of every triangle is opposite to the greater angle ; and , conversely , the greater angle is opposite to ...
... greater , and from it cut off DB equal to AC the less , and join CD . Then , because in the tri- angles DBC , ACB ... greater side of every triangle is opposite to the greater angle ; and , conversely , the greater angle is opposite to ...
Σελίδα 21
... greater than the angle ABC . For if ACB is not greater than ABC , it must be either equal to it , or less . It is not equal , because then the side AB would be equal to the side AC ( Prop . XI . ) , which is con- trary to the ...
... greater than the angle ABC . For if ACB is not greater than ABC , it must be either equal to it , or less . It is not equal , because then the side AB would be equal to the side AC ( Prop . XI . ) , which is con- trary to the ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD AC is equal allel altitude angle ABC angle ACB angle BAC base BCDEF bisected chord circle circumference cone 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 given angle greater Hence Prop hyperbola inscribed intersection join latus rectum less Let ABC lines AC major axis mean proportional measured by half meet 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 side BC similar similar triangles solid angle sphere spherical triangle square subtangent tangent THEOREM triangle ABC triangle DEF vertex vertices VIII
Δημοφιλή αποσπάσματα
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 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
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 101 - When you have proved that the three angles of every triangle are equal to two right angles...
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 37 - Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third.
Σελίδα 32 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 15 - Wherefore, when a straight line, &c. QED PROP. XIV. THEOR. 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 30 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles; and the three interior angles of every triangle are together equal to two right angles.