Question 1049375
if  the points ({{{-1}}},{{{ -2}}}) and ({{{-1}}}, {{{3}}}) be the endpoints of a circle-> there is no such a notion  "the endpoints of a circle"

it could be two points on a circle opposite to each other, or {{{endpoints}}} of the {{{diameter}}}

if so, than the length of the diameter of the circle is equal to distance between these two points

*[invoke distance_formula -1, -2, -1, 3]

so, the diameter of the circle is {{{5}}}