Given the vertices in vectors X,Y, return the area of the polygon they define.
Switch matrix to a column vector
02 - Vector Variables 1
04 - Scalar Equations 1
07 - Common functions and indexing 4
Back to basics - mean of corner elements of a matrix
Find the diagonal of the square of side L
Non trivial identities - flipping
A shooting competition
Non trivial identities - differentiation
Non trivial identities - reshape
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