As shown in the figure, in the plane rectangular coordinate system, △ ABC is an equilateral triangle, and the side length is 2. If the coordinates of point a are known to be (4,4), and BC is parallel to the axis, then the coordinates of point C are equal The coordinates are () A. (5,4-radical 3) B, (5,4 + radical 3) C, (5,2-radical 3) d, (5,2 + radical 3) Sorry, there is no picture

As shown in the figure, in the plane rectangular coordinate system, △ ABC is an equilateral triangle, and the side length is 2. If the coordinates of point a are known to be (4,4), and BC is parallel to the axis, then the coordinates of point C are equal The coordinates are () A. (5,4-radical 3) B, (5,4 + radical 3) C, (5,2-radical 3) d, (5,2 + radical 3) Sorry, there is no picture

Choose a, according to the given answer can only be BC parallel to the X axis, and C on the right, then according to the properties of equilateral triangle, we can calculate a1c1 = 4 / radical 3, the abscissa of C is 5, a1d = 1, according to C1d / a1c1 = CD / Aa1, we can calculate CD = 4 - radical 3