GRE
The slope of the line m
-$$\frac{1}{2}$$
The slope of line L
$$\frac{4}{5}$$
$$\frac{1}{2}$$
The slope of the line l
$$\frac{10}{9}$$
The slope of line m that is perpendicular with line l
-1
The distance between the origin and (x, y)
The distance between the origin and(1-x,1-y)
s
t
The maximum value of $$y$$
$$0$$
The length of chord BC
The radius of circle A
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