What is the near or exact matching of the left and right sides of a three-dimensional for or a two-dimensional composition?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x

Angle 1 and 2 are a linear pair. angle 1 equals x-39 and angle 2 equals x+61 . find the measure of each angle