The length of a rectangle is 16 centimeters, and the diagonal of the rectangle is 20 centimeters long. what is the perimeter of the rectangle

The perimeter is 56 units.
The width of the rectangle (and subsequently, the perimeter) can be found using the Pythagorean theorem. The diagonal of the rectangle acts as the hypotenuse of a right triangle with the length being one of the legs.

Set up the equation like so:  (remembering that Pythagorean theorem is ).

Simplify to .

Subtract 256: 

Calculate that  from squaring both sides. Therefore, the width equals 12.

The perimeter of a rectangle is , where L, the length, is 16, and W, the width, is 12.

You find that the perimeter is 56 units.

29. because you will divide each number of months by 12 to find the number of years. which would mean, 5, 12.5, 16, 45, 50, 72.5. which is crazy. anyhow, i think you find the median in the middle. and yea hope your test goes good