Square: ① All four corners of a square are right angles and all four sides are equal; ② The two diagonals of a square are equal and divided vertically, and each diagonal divides a set of diagonals equally.
Diamond: ① Four sides are equal; 2 diagonal equality; Adjacent corners are complementary; ③ Diagonal lines are perpendicular to each other, and each diagonal line bisects a set of diagonal lines.
Rectangular: ① Two groups of opposite sides are parallel and two groups of opposite sides are equal; ② All four corners are right angles; ③ Diagonal lines are equal.
Mathematics is a discipline that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view. In the development of human history and social life, mathematics also plays an irreplaceable role, and it is also an indispensable basic tool for studying and studying modern science and technology.
Mathematics is a science that studies the relationship between spatial form and quantity in the real world. It is divided into elementary mathematics and advanced mathematics. It is widely used in scientific development and modern life production, and is an essential basic tool for studying and studying modern science and technology.
Mathematics is a subject that studies concepts such as quantity, structure, change and spatial model with symbolic language. Mathematics, as an expression of human thinking, embodies people's aggressive will, meticulous logical reasoning and pursuit of perfection.