Elements of Geometry and Conic SectionsHarper & brothers, 1861 - 234 sider |
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Resultat 1-5 av 57
Side 57
... similar , but similar figures may be very unequal . 4. Two sides of one figure are said to be reciprocally pro- portional to two sides of another , when one side of the first is to one side of the second , as the remaining side of the ...
... similar , but similar figures may be very unequal . 4. Two sides of one figure are said to be reciprocally pro- portional to two sides of another , when one side of the first is to one side of the second , as the remaining side of the ...
Side 70
... similar . Let ABC , DCE be two equiangular triangles , having the angle BAC equal to the angle CDE , and the angle ABC equal a to the angle DCE , and , consequently , the angle ACB equal to the angle DEC ; then the homologous sides will ...
... similar . Let ABC , DCE be two equiangular triangles , having the angle BAC equal to the angle CDE , and the angle ABC equal a to the angle DCE , and , consequently , the angle ACB equal to the angle DEC ; then the homologous sides will ...
Side 71
... similar . Cor . Two triangles are similar when they have two an gles equal , each to each , for then the third angles must also be equal . Scholium . In similar triangles the homologous sides are opposite to the equal angles ; thus ...
... similar . Cor . Two triangles are similar when they have two an gles equal , each to each , for then the third angles must also be equal . Scholium . In similar triangles the homologous sides are opposite to the equal angles ; thus ...
Side 72
... similar . Wherefore , two triangles , & c . PROPOSITION XX . THEOREM . Two triangles are similar , when they have an angle of the one equal to an angle of the other , and the sides containing those angles proportional . Let the ...
... similar . Wherefore , two triangles , & c . PROPOSITION XX . THEOREM . Two triangles are similar , when they have an angle of the one equal to an angle of the other , and the sides containing those angles proportional . Let the ...
Side 73
... similar . First . Let the homologous sides be parallel to each other . If the side AB is parallel to ab , and BC to bc , the angle B is equal to the angle b ( Prop . XXVI . , B. I. ) ; also , if AC is parallel to ac , the angle C is ...
... similar . First . Let the homologous sides be parallel to each other . If the side AB is parallel to ab , and BC to bc , the angle B is equal to the angle b ( Prop . XXVI . , B. I. ) ; also , if AC is parallel to ac , the angle C is ...
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ABCD AC is equal allel altitude angle ABC angle ACB angle BAC base BCDEF bisected CA² chord circle circumference cone contained convex surface curve described diagonals diameter draw ellipse equal angles equal to AC equally distant equiangular equilateral equivalent exterior angle foci four right angles frustum given point given straight line greater hyperbola hypothenuse inscribed intersect join latus rectum 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 quadrant radii radius ratio rectangle regular polygon right angles Prop right-angled triangle Scholium segment side AC similar similar triangles solid angle sphere spherical triangle square subtangent tangent THEOREM triangle ABC vertex vertices
Populære avsnitt
Side 27 - If 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 two triangles will be equal.
Side 157 - The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC...
Side 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
Side 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.
Side 101 - When you have proved that the three angles of every triangle are equal to two right angles...
Side 10 - CHG; and they are adjacent angles; but when a straight line standing on another straight line makes the adjacent angles equal to one another, each of them is a right angle; and the straight line which stands upon the other is called a perpendicular to it; therefore from the given point C a perpendicular CH has been drawn to the given straight line AB.
Side 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.
Side 22 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Side 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.
Side 41 - It follows that either couplet of a proportion may be multiplied or divided by any quantity, and the resulting quantities will be in proportion. And since by...