on the xy-coordinate plane, what is the area of a right triangle, one side of which is defined by the points(2,3) and (-4,0)?
1.the triangle's sides cross the y-axis at exactly two points altogether.
2.the y-coordinate of the third vertex of the triangle is zero.
a.1 alone
b.2 alone
c.both
d.each
e.together not
key：b
但是2我觉得有两种可能啊，第三个点可以是（2，0）和（3,5，0)，所以我选e | 
