A fall line is an upland region of the coastal plains meets and the term states that lots of rivers fall from this Piedmont to the coastal plain making rapids with waterfalls.
These falls are important as for the settlement as they block the ocean going ships from entering in any further upstream and also provided water power to run the region industries.
Yes, stencil one overlaps exactly with the original image. The original pattern is now hidden behind stencil one. Each point on stencil one corresponds with a point on the original image.
Let's say the given area is 7.065 inches squared for the quarter circle. To find the radius, you first multiply the 7.065 by 4. You get 7.065 * 4 = 28.26.
