For A1, A2, and A3 as area coordinates and s1, s2 and s3 as shape functions for the element shown, which relation is correct?

For A1, A2, and A3 as area coordinates and s1, s2 and s3 as shape fun

1.	For A1, A2, and A3 as area coordinates and s1, s2 and s3 as shape functions for the element shown, which relation is correct?
A.	s1=A1/(A1+A2+A3)
B.	s1=(A1+A2+A3)/A1
C.	s1=A1+A2+A3
D.	s1=A1
Answer» B. s1=(A1+A2+A3)/A1

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For A1, A2, and A3 as area coordinates and s1, s2 and s3 as shape functions for the element shown, which relation is correct?

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