In Clash of Clans, mortars are powerful with long range attacks (the larger circle in the picture above), but have short range blind spots. The blind spot area is a smaller circle of radius = 5 around the mortar.
You are the game designer and programmer, so it is on you to calculate the blind spot area.
What is the area of the blind spot circle, measured in π?
What is the circumference of the blind spot circle, measured in π?
Aligned with Common Core:
7.G.4 - Area and circumference of a circle