Revise the different types of angles and rules for calculating angles. This guide includes interactive activities and a quiz. NEW: Angles in parallel lines Revise alternate, correspondent or ...

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 ...

The star-like "kagome" structure of the molecules in this 2D metal-organic material (shown in an STM image on the left and a non-contact AFM image on the right) produces strong electronic interactions ...

Epithelial cells, which cover the surfaces of many organs, adopt a previously undescribed geometric shape - the scutoid - so that the tissue can curve, scientists have found. The epithelial cells ...