But it is not possible to say that they r equidistanct from origin with statement 2 alone as it is a rectangular coordinate system.. points are symmetrical and equidistance abount the origin in a rectangle.....
When they say 'rectangular coordinate system', they just mean that the x-axis and y-axis make a right angle between them. So they're just talking about the standard x-y coordinate plane. It doesn't mean that any two points are equidistant from the origin. Statement 2 here is not sufficient, since you need some information about p.
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