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Shape
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<p>A shape is a <a href="/facts/Graphics/1V76IF8J">graphical representation</a> of an object's form or its external boundary, outline, or external <a href="/facts/Surface_(mathematics)/whF08jvy">surface</a>. It is distinct from other object properties, such as <a href="/facts/Color/XDvW7ESP">color</a>, <a href="/facts/Surface_texture/URUzkL9u">texture</a>, or <a href="/facts/Material/Rmt5HySL">material</a> type. In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, <i>shape</i> excludes information about the object's <a href="/facts/Position_(geometry)/Tpk5d9f2">position</a>, <a href="/facts/Size/brTWIYNF">size</a>, <a href="/facts/Orientation_(geometry)/Tj24mTJ8">orientation</a> and <a href="/facts/Chirality/hjx0eGrB">chirality</a>. A <i>figure</i> is a representation including both shape and size (as in, e.g., <a href="/facts/Figure_of_the_Earth/z1LvpVgd">figure of the Earth</a>). </p><p>A plane shape or plane figure is constrained to lie on a <i><a href="/facts/Plane_(geometry)/tAUtRFcn">plane</a></i>, in contrast to <i><a href="/facts/Solid_figure/tHH3JFoq">solid</a></i> 3D shapes. A two-dimensional shape or two-dimensional figure (also: 2D shape or 2D figure) may lie on a more general curved <i><a href="/facts/Surface_(mathematics)/whF08jvy">surface</a></i> (a <a href="/facts/Two-dimensional_space/f4b397W8">two-dimensional space</a>). </p>