Which of the following postulates led to the discovery of non-Euclidean geometry? O A. Any straight line segment can be extended indefinitely. O B. A straight line segment can be drawn between any two points. O C. All right angles are equal to one another. O D. Through a given point not on a given line, there is exactly one line parallel to the given line.
This circle is centered at the origin, and the length of its radius is 6. what is the circle's equation? a. x^2+y^2=36 b x^2+y^2=6 c x+y=36 d x^6+y^6=1