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parallelograms
2d shapes only have length and width, while 3d shapes have length, width and depth.
In geometry, it refers to two shapes that are identical in shape and size. If one shape can be moved - without stretching or cutting - so that it exactly covers another, then the two shapes are said to be congruent.
Shapes with an irregular cross-section.
Congruent means when 2 shapes are exactly the same Similar means the shapes are exactly same but with different sides
The 2 dimensions of 2d shapes and length and breadth.
Similar shapes are the same shape and not the same size but congruent shapes are exactly alike
Large groups of galaxy clusters that appear in sheetlike and threadlike shapes are called superclusters.
You multiply the width with the length.
Symmetrical
yes