For example, a triangle made of paper would ... What happens when you push the side of a rectangle? The rectangle is a wobbly, unstable shape. When you push the side, it flops into a slanted ...

For example a cube has 8 vertices. 2D shapes are boring ... they're like a stretched cube and have 2 square faces and 4 rectangular faces. Oh yeah. Alright. Please make him stop.

These reflected rectangles are example of congruent shapes. When transforming a shape, either through translation, reflection or rotation, a congruent shape is produced. Enlargements create shapes ...

the ideal table shape will become clear. If the usable space is more oblong, such as in the six by three feet example, a rectangle would be your pick (or oval for a bit of extra clearance).