HÌNH THOI - nghĩa trong tiếng Tiếng Anh

By the way, assuming that and have equal norms (which means that their dot squares are equal), it demonstrates analytically the fact that two diagonals of a rhombus are perpendicular.

For example, the (isogonal) rectangle and (isotoxal) rhombus are duals.

So the centre of a square, rectangle, rhombus or parallelogram is where the diagonals intersect, this being (amongst other properties) the fixed point of rotational symmetries.

The cross section of a green strut is a rhombus, where the ratio of the diagonals is 2.

The rhombus has within religious symbolisms.