Check if a point is in a rotated rectangle (C#)

Question

I have a program in C# (Windows Forms) which draws some rectangles on a picturebox. They can be drawn at an angle too (rotated).

I know each of the rectangles\' star

Answer 1

Would the rectangles be allowed to overlap? If so, would you want all the rectangles in a point, or just the one in the top layer?