I think the value of b is 130 degrees. Hope this helps!
This is a rectangle... Did you draw the points?
Find
- the length of the segment going from (-5,0) to (0,-5)
- and the length of the segment from (-20,-15) to (-15,-20).
These are the length and width of the rectangle; multiply both quantities.
The width is found with the formula:

The length is
1. 16
2. 7
3. 36
Hope this helps
4 times the radius of our