They need to have the same angles and proportional side lengths.
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Two congruent geometric figures have the same shape and the same size, whereas two similar geometric figures have the same shape but they differ in size.
A circle is the only geometric two dimensional shape that does not have any vertices, or points. However, there are non geomatric shapes that do not have any vertices. These are called organic shapes and are constructed either of only curved sides or curved sids and straight sides. Many three dimensional shapes do not have any vertices, the geometric ones include cylinders, spheres, and hemispheres.
the main tridimensional geometric form is the cube fromthe cube you can get a pyramid by cutting edges, then the rectangle is a geometrical shape too but bidimensional.
similar polygons may not be congruent (different sizes) congruent polygons are always similar (equal in every geometric respect - including
similar sides.