<s>[INST] A sphere (or ball) is the set of all points in three-dimensional space that are at a given distance (the radius) from a given point (the center.)
The areas of two intersecting circle are compared, which is part of the process in finding an area inside the space between them. 
In comparing the two intersecting circles, (lens-shaped area) in the following figure:
![](image.jpg)
What is the ratio of the area in the lens-shaped region (region where the two circles overlap) to the area of circle B (B is the smaller of the two circles)?[/INST]