Given the diameter d of the inner circle of the annulus. Given length z of a chord of the outer circle of the annulus. This chord is tangent to the inner circle of the annulus. Find the area y of the annulus.
Reverse Run-Length Encoder
Array of Ones
Divide by 4
chance in percent for minimum K heads when a good coin is tossed N times?
Distance walked 1D
letter yes yes & letter no no
Minimum possible M of the maximum side of a triangle of given area A.
Distance walked 3D
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