A1 is the first area and N1 is its shape function then shape function N1= ___
a) A1/A
b) A-A1
c) A1+A
d) A1
Answer: a
Explanation: The shape functions are physically represented by area co-ordinates. A point in a triangle divides into three areas. The shape functions are precisely represented as
N1=A1/A .
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