Honeycomb is a strictly hexagonal cylinder with a flat hexagonal opening at one end and a closed hexagonal diamond bottom at the other end, which consists of three identical diamonds. The rhombic obtuse angle of the chassis is 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both firm and material-saving. The honeycomb wall thickness is 0.073 mm, and the error is very small.

Red-crowned cranes always migrate in groups. They are arranged in herringbone. The angle of the herringbone is 1 10 degrees. More accurate calculation also shows that the angle of the herringbone is half-that is, the angle between each side and the crane group direction is 54 degrees, 44 minutes and 8 seconds! And the angle of diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds!

In winter, cats always hug their bodies into a ball when they sleep, and there is also math in it, because the ball minimizes the surface area of the body, so it emits the least heat.