What is the equation of the circle with center (1, - 6) that passes through the point (- 1, 3)

Could someone with number 1 and 2

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20