gwD 12--31

superkun

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 > ATH gradientshapeok="t" extrusionok="f" connecttype="rect">ATH>

B. < y <

C. < y <

D. < y <

E. y <

Answer: A

怎么做的呢

apply1

选项在我这里显示不全,我只能看到完整的题目. 我想说一句的是,请大家注

意那个right triangle,是直角三角形的意思.其实这题根本没有想想那么复

杂.有余X<Y<Z,Z肯定是直角边,那么很容易就知道面积应该是1/2*X*Y=1 ,==>

推出XY=2,又因为X<Y,所以,Y>根号2.....