How many auxiliary formulae can be formed from the expression in the b

1.	How many auxiliary formulae can be formed from the expression in the box? \[A=\frac{1}{2}h\,(a+b)\]
A.	2
B.	3
C.	4
D.	1
Answer» C. 4

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How many auxiliary formulae can be formed from the expression in the box? \[A=\frac{1}{2}h\,(a+b)\]

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