 | John Casey - 1886 - 262 ページ
...the perpendiculars from the points of contact on any tangent to the circle equal riR. Dem. — Let A, B, C, D, E, &c., be the points of contact of the...the tangents at the same points ; but the sum of the -Ls from P on the tangents at the points A, B, C, &c., = »E(2). Hence the sum of the -Ls from the... | |
 | John Casey - 1888 - 279 ページ
...from the points of contact on any tangent to the circle equal riR. Dem. — Let A, B, C, D, E, &o., be the points of contact of the sides of the polygon with the 0, L any tangent to the O, and P its point of contact. Now, the -Ls from the points A, B, C, &c., on... | |
 | Archimedes - 1897 - 532 ページ
...sphere, the angular points of the polygon except A, A' will move round the surface of a larger sphere, the points of contact of the sides of the polygon with the great circle of the inner sphere will describe circles on that sphere in planes perpendicular to AA',... | |
 | Arhimēdēs - 2004 - 522 ページ
...sphere, the angular points of the polygon except A, A' will move round the surface of a larger sphere, the points of contact of the sides of the polygon with the great circle of the inner sphere will describe circles on that sphere in planes perpendicular to AA',... | |
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If the' great circle and the circumscribed polygon revolve together about AA', the great circle will describe the surface of a sphere, the angular points of the polygon except A, A' will move round the surface of a larger sphere, the points of contact... 