Exploring Simple Regions
The concept of simplicity of regions can be used to determine whether to integrate with respect to x or y when finding area of a region with the help of integration or to split the region into simple regions of same or different types. There are two types of simple regions: vertically simple and horizontally simple.
For more on finding area check my online book
"Flipped Classroom Calculus of Single Variable"
https://versal.com/learn/vh45au/
