The area of the ring with radii 14 and 14 equal to 0
A ring is a flat geometric shape bounded by two concentric circles.
Ring area formula 
where R is the radius of the outer circle, r is the radius of the inner circle.
where D is the diameter of the outer circle, d is the diameter of the inner circle.Solution:
S = π·(R2-r2)
= π·(142-142)
= π·(196-196)
= 0π
=
0
a: The area of the ring with radii 14 and 14 equal to 0