2D shapes Triangles and quadrilaterals Learn about triangles and quadrilaterals with BBC Bitesize Key Stage 3 Maths.

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book or you can draw them on a piece of paper. 2D shapes have sides and corners (also ...

Harvard University. "Simple math explains dramatic beak shape variation in Darwin's finches." ScienceDaily. ScienceDaily, 1 March 2010. <www.sciencedaily.com / releases / 2010 / 02 / 100222182153 ...

In a study appearing in the Feb. 16 Early Edition of the Proceedings of the National Academy of Sciences, Harvard researchers demonstrated that simple changes in beak length and depth can explain ...