Geometry is the branch of mathmatics concerned with the shape, size, angles and properties of space.
行业： 数学
Ax2 + 由 + C = 0。
中一词 Ax2 二次方程。
半径的复数形式。
A one-dimensional figure that consists of one endpoint A, one point B, all of the points on , and all points for which B is between them and A; written .
A rectangle is a four sided quadrilateral in which the opposite sides are equal in length and all its four angles are right angles.
四个边的多边形 ；请参阅四边形。
有长度、 宽度和厚度 （即空间）。
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