2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is a special type of rectangle, where all 4 ...

This happens without any of the rectangle's sides changing length. When you poke the top of the triangle, the two sides squeeze together and the bottom side pulls apart. The triangle doesn't bend ...

The industry standard way of representing screen resolution is publishing the number of pixels that form the two sides of the display rectangle.