Cambridge, Mass., February 22, 2010 -- From how massive humpbacks glide through the sea with ease to the efficient way fungal spores fly, applied mathematicians at Harvard have excavated the equations ...
A quadrilateral is a 2D shape with four sides. Different types of quadrilateral have different numbers of lines of symmetry. A trapezium has one pair of parallel sides. Some trapeziums have one line ...
Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...
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