Elements of Geometry and Conic SectionsHarper & brothers, 1861 - 234 sider |
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Resultat 1-5 av 21
Side 36
... measuring unit is contained A B 15 times in A and 24 times in B , then the ratio of A to B is that of 15 to 24. And although it may be difficult to find this measuring unit , we may still conceive it to exist ; or , if there is no unit ...
... measuring unit is contained A B 15 times in A and 24 times in B , then the ratio of A to B is that of 15 to 24. And although it may be difficult to find this measuring unit , we may still conceive it to exist ; or , if there is no unit ...
Side 55
... measured by the arc BE ; hence the angle BAE is measured by the half of BE . For the same reason , the angle DAE is measured by half the arc DE . Therefore , the whole angle BAD is meas- ured by half the arc BD . Second . Let C , the ...
... measured by the arc BE ; hence the angle BAE is measured by the half of BE . For the same reason , the angle DAE is measured by half the arc DE . Therefore , the whole angle BAD is meas- ured by half the arc BD . Second . Let C , the ...
Side 56
... measured by half an arc less than a semicircumference . Every angle inscribed in a segment less than a semicircle is an obtuse an- gle , for it is measured by half an arc greater than a semicircumference . B A E D C Cor . 4. The ...
... measured by half an arc less than a semicircumference . Every angle inscribed in a segment less than a semicircle is an obtuse an- gle , for it is measured by half an arc greater than a semicircumference . B A E D C Cor . 4. The ...
Side 61
... measured by the product of AB by AF . For , upon the base AB , construct a rectangle having the altitude AF ; the par- allelogram ABCD is equivalent to the rec- tangle ABEF ( Prop . I. , Cor . ) . But the rectangle ABEF is measured by ...
... measured by the product of AB by AF . For , upon the base AB , construct a rectangle having the altitude AF ; the par- allelogram ABCD is equivalent to the rec- tangle ABEF ( Prop . I. , Cor . ) . But the rectangle ABEF is measured by ...
Side 62
... measured by half the product of DE , by the sum of its sides AB , CD . Bisect BC in F , and through F draw GH parallel to AD , and produce DC to A H. In the two triangles BFG , CFH , the side BF is equal to CF by construction , the ...
... measured by half the product of DE , by the sum of its sides AB , CD . Bisect BC in F , and through F draw GH parallel to AD , and produce DC to A H. In the two triangles BFG , CFH , the side BF is equal to CF by construction , the ...
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Vanlige uttrykk og setninger
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...