jj题目？？

bettyofarim

8. (2,0) and (0,2) are on a circle. What is the radius of the circle. a) ? (I
forget) b) the diameter of the circle is equal or less than 2*2^(1/2)

ANS: SOMEBODY CHOOSE B. I DON'T KNOW WHY?

falcons

这两点在同一圆上最短半径是两点位于直径两段时，此时半径为根号2

b说半径小于等于根号2，所以半径只能取根号2