Siâp

Yn fathemategol, ffin allanol gwrthrych, neu ei amlinelliad, yw siâp.

Siâp
Gwahanol fathau o siapau

Yn fathemategol, ffin allanol gwrthrych, neu ei amlinelliad, yw siâp.

Dosbarthu siapau

Gellir rhoi rhai siapiau syml mewn categorïau bras. Er enghraifft, mae polygonau yn cael eu dosbarthu yn ôl nifer eu hymylon e.e. trionglau, pedrochrau, pentagonau, ac ati. Rhennir pob un o'r rhain yn gategorïau llai; gall trionglau fod yn hafalochrog, isosceles, lem ac aflem, anghyfochrog, ac ati, tra y gall pedrochrau fod yn betrual, rhombws, trapesoid, sgwâr, ac ati. Ymhlith siapau geometrig eraill y mae: pwyntiau, llinellau, planau a thrychiadau conig megis elipsau, cylchoedd a pharabolâu.

O ran gofod tri dimensiwn, y siapau mwyaf cyffredin yw polyhedra, sef siapau gydag arwynebau fflat, elipsoidau, sef ffurfiau siâp wy neu siâp sffêr, silindrau a conau.[1]

Cyfeiriadau

  1. ↑ Hubbard, John H.; West, Beverly H. (1995). Differential Equations: A Dynamical Systems Approach. Part II: Higher-Dimensional Systems. Texts in Applied Mathematics. 18. Springer. t. 204. ISBN 978-0-387-94377-0.

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