Answer:

Each diagonal of the rectangle is a hypotenuse of a right triangle and since the length of each leg can be

determined, the Pythagorean Theorem may be used to find the length of each diagonal.

The length of AC is equal to the square root of 4² + 3² or 5.

The length of BD is equal to the square root of 4² + 3² or 5.

Therefore, the diagonals are congruent.