Areas Related to CirclesStep 1 of 3
Question
A circular path has outer radius 10 m and inner radius 6 m. Find its exact area in terms of π.
Path area = outer area − inner area
Which operation gives the path area?
What you will learn
Model a shaded annulus as the difference of two circle areas and preserve the squared radii.
Common mistake to avoid
Subtracting radii before squaring gives $\pi(R-r)^2$, which is not the area between two concentric circles.
Make this mistake visibleHelpful?