What is the area of a square with diagonal of 6?

What is the area of square with an diagonal of sqrt(2) ?

What is the area of a square whose diagonal measures 4 cm?

What is the area of a square whose diagonal measures 4 cm?

What is the diagonal of a square with an area of 25?

If the sum of the lengths of the diagonals of a rhombus is 10 m and if its area is 9m^(2) , then what is the sum of the square of the diagonals ?

Prove that the area of the square drawn on the diagonal of a square is twice the area of the given square.