A circle in the $xy$-plane has a diameter with endpoints $(a, 11)$ an…

Question

Prompt

A circle in the

x y

-plane has a diameter with endpoints

(a, 11)

and

(a, d)

, where

a

and

d

are constants. An equation of this circle is

(x - a)^{2} + (y - 17)^{2} = r^{2}

, where

r

is a positive constant. What is the value of

d