3 2+4 2 = 25, and the distance to the origin is 5, which is in the circle.
4 2+4 2 = 32, the distance to the origin is 2, and the root number 2 is in the circle.
4^2+5^2=4 1<; 49. In circles
4^2+6^2=52>; 49, outside the park
From above, we can see that point D is outside the circle.