Properties of the Rectangle

Property 2

The two diagonals of the rectangle are equal in length.

Symbolic Representation

In the opposite figure,

∵ ABCD is a rectangle.

∴ AC = BD                             (two equal diagonals)
 Please enable Java for an interactive construction (with Cinderella).
Drag free points A and B, or semi free point C to realize that the two diagonals of the rectangle are equal in length.