Each sphere touches the plane at a point, and let us call those two points "F" 1 and "F" 2.
Call those two points "F" 1 and "F" 2. Each sphere touches the plane at a point.
Each sphere touches the plane at a point. Call those two points "F" 1 and "F" 2.
Each sphere touches the plane at a point. Call those two points "F" 1 and "F" 2.