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Diagonals of square are ___

Prove that the diagonals of a square are equal.

Point of intersection of the diagonals of square is at origin and coordinate axis are drawn along the diagonals. If the side is of length a, then one which is not the vertex of square is :

The diagonal of a square A is (a+b). The diagonal of a square whose area is twice the area of square A is

The diagonal of a square measures 6sqrt(2) cm. The measure of the diagonal of a square whose area is twice that of the first square is :

If one diagonal of a square is the portion of the line (x)/(a)+(y)/(b)=1 intercepted by the axes,then the extremities of the other diagonal of the square are

If one diagonal of a square is the portion of the line x/a + y/b = 1 intercepted by the axes, then the extremities of the other diagonal of the square are

Find the diagonal of a square whose side is 10 cm.