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in Finite Element Method by (110k points)
Shape functions are linear functions along the _____

(a) Surfaces

(b) Edges

(c) Elements

(d) Planes

I had been asked this question in exam.

My question is based upon Two Dimensional Isoparametric Elements in division Two Dimensional Isoparametric Elements and Numerical Integration of Finite Element Method

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Right option is (b) Edges

Easy explanation: The shape function is the function which interpolates the solution between the discrete values obtained at the mesh nodes. Therefore, appropriate functions have to be used and, as already mentioned, low order polynomials are typically chosen as shape functions.

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