| 单词 | plane angle |
| 例句 | It is not necessary to dwell at length upon the dihedral angle, except to show the analogy between it and the plane angle. The Teaching of Geometry 2011-10-12T02:00:52.133Z Every solid angle is contained by plane angles, which are together less than four right angles—has no analogous theorem in the plane. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z A solid angle is that which is made by more than two plane angles meeting in one point and not lying in the same plane, as the angle of a cube. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli I have the following by me: The Geometric Base, 1825.—The theory of plane angles. A Budget of Paradoxes, Volume I Of the solid angles there are two opposite to one another, such as C and E, which are each composed of three equal obtuse plane angles. Treatise on Light A plane angle is the inclination to each other of two lines in a plane which meet each other and do not lie in a straight line. The Teaching of Geometry 2011-10-12T02:00:52.133Z If a solid angle be contained by three plane angles, any two of them are together greater than the third. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Footnote 2: Since the sum of the plane angles at a corner of a regular solid must be less than four right angles, it is easily seen that few regular solids are possible. Kepler The second solid is composed of the same triangles, which unite as eight equilateral triangles, and make one solid angle out of four plane angles—six of these angles form a regular octahedron. Timaeus Students have more difficulty in grasping the meaning of the size of a polyhedral angle than is the case with dihedral and plane angles. The Teaching of Geometry 2011-10-12T02:00:52.133Z |
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