Q31:
A certain right triangle has sides of length x, y, and z, where x < y < z. If the area of this triangular region is 1, which of the following indicates all of the possible values of y ?
A. y >
B.
C.
D.
E. y <
Answer: A y>根号2
这个,难道不是这样么?
the area of this triangular region is 1 可以推出 xy=2
x < y < z 可以推出 xy<y*y
综合上面2个,Y平方大于2,即Y大于根号2
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