In the plane rectangular coordinate system, O is the coordinate origin, a (1,1), a point P is determined on the x-axis, so that △ AOP is an isosceles triangle, then the point P that meets the condition has () A. 4 B. 3 C. 2 d. 1

In the plane rectangular coordinate system, O is the coordinate origin, a (1,1), a point P is determined on the x-axis, so that △ AOP is an isosceles triangle, then the point P that meets the condition has () A. 4 B. 3 C. 2 d. 1

(1) If Ao is the waist, there are two cases: 1. When a is the vertex of vertex, P is the intersection of the circle with a as the center and OA as the radius with X axis. If OA is the bottom, P is the intersection of the perpendicular of OA with X axis. 2. When O is the vertex of vertex, P is the intersection of the circle with o as the center and OA as the radius with X axis