Use the Pythagorean theorem to find the value of b²

So what is the Pythagorean Theorem:

  ⇒ it states the sum of both leg's lengths squared is equal to

      ⇒  hypotenuse's length squared

  (look at the image attached for a better explanation)

To find out , let's look to the Pythagorean equation to see what we are missing:

So b^2 = 225 ⇒ Choice B

Hope that helps!

step-by-step explanation:

a rhombus is a parallelogram enjoying his symmetry.