First, not all snowflakes are perfectly symmetrical. In fact, the vast majority of snowflakes are asymmetrical. However they appear to be because on a microscopic scale, each side of a crystal being is such close proximity to the other will produce similar results because each molecule was formed under the same environmental conditions simultaneously.
Snowflakes have hexagonal shapes because of the way water molecules arrange themselves when freezing. As water vapor cools and condenses, water molecules bond together in a hexagonal pattern due to the molecular structure of water. This hexagonal structure is further influenced by the temperature and humidity conditions during the snowflake's formation.
Snowflakes aren't always shaped like hexagons - that is just the idealistic portrayal that we associate with the word 'snowflake', just as ran and tears do not fall in the perfect little pointed tear drop shapes that we often associate them with. Snowflakes form in numerous different shapes, it's really quite random - take a look at photos of snowflakes under magnifying glasses, and you'll see for yourself. As to why people immediately associate snowflakes with those perfect, pointy, hexagonal shapes, well - that's all down to psychology. I would suggest it would be because we prefer to think of things in their idyllic forms, not exactly as they appear in nature, as these idyllic forms tend to be more aesthetically pleasing.
Frozen precipitation in the form of white or translucent hexagonal ice crystals that fall in soft, white flakes.
snow
No.....No two snow flakes are exactly alike. They all have something unique about each and every one of them. There are similar shapes - 3 and 6 sided - and theoretically, you could have many of the same shape. That would be if they fell in the same manner, encountering the same amount of dust and moisture. See attached links.
Snow flakes
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Frozen precipitation in the form of white or translucent hexagonal ice crystals that fall in soft, white flakes.
Snow flakes are made from water vapor in the air that combine to make little ice crystals. The ice crystals like to be in hexagonal forms, and make flakes.
It is estimated that there are trillions of possible variations for snowflake shapes due to the unique arrangement of water molecules as they freeze. Each snowflake is believed to have a one-of-a-kind design.
The water vapour forming snow has to reach 0oC to form ice crystals. There is no lower temperture for the snow formation. Interestingly the snow crystals formed are of different shapes as the temperture is lowered and the location of the formation occurs. Six-sided hexagonal crystals are shaped in high clouds, needles or flat six-sided crystals are shaped in middle height clouds and a wide variety of six-sided shapes are formed in low clouds. At colder temperatures the flakes have sharper tips on the sides of the crystals and more branching of the snowflake arms. Snowflake shapes at various (approximate) formation temperatures are: -16° C - Thin hexagonal plates -10° C - Needles -8° C - Hollow columns -5°C - Sector plates (hexagons with indentations) -2°C - Dendrites (lacy hexagonal shapes)
Two hexagonal "ends" and six rectangular sides.
Snow flakes will cost you real money and you can buy them through the app.
Square
Hexagon. Hexagonal prism. Hexagonal pyramid. Hexahedron.
Lacy flakes of frozen water are snowflakes. Snowflakes form when water vapor in the air condenses and freezes into intricate ice crystals, creating the unique shapes and patterns we see falling from the sky.
Snow is frozen water vapor that falls to Earth as flakes.
Because regular hexagonal shapes are able to tessellate leaving no gaps or overlaps.
Snow flakes.