In two-dimensional space, a ring can be constructed by using two concentric circles. Determine the area of a ring which has r1 as the inner radius and r2 as the outer radius.
Swap the input arguments
2 b | ~ 2 b
Say something funny
Is this triangle right-angled?
Remove the first, third and fifth rows of a matrix
Volume of Spherical Shell
Perimeter of a quadrilateral
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