Then according to the distance formula between two points,
①x^2+y^2= 1
②(x- 1)^2+(y-2)^2=4
To solve it, substitute ① into ②.
X=-3/5，y=4/5。
So D(-3/5, 4/5)
Question 1:( 1) Preference (2) Picking up (3) Strange (4) This (1 minute per grid)
1: C(3 o'clock)
1:C(3 o'clock)
Small problem 1:( 1) From this point o