It's going to be an isosceles-right triangle where the hypotenuse of the isosceles-right triangle sits along the base. So it's isosceles, so that's equal to that. It's a right triangle. And then this distance between that point and this point is the same as the distance between f of x and g of x for this x value right over there. And obviously that changes as we change our x value. And to help us visualize the shape here, I've kind of drawn a picture of our coordinate plane. If we view it as an angle, if we're kind of above it, you can kind of start to see how this figure would look.