Circle X is shown. Points W, Y, and Z are on the circle. Lines are drawn through each point on the circle.

Two lines extend from point S to create a right angle. The vertical line extends from point S through point R. The horizontal line extends right from point S through point T. A third line extends right and up from point S through point U.

Which undefined term can contain parallel lines?
The definition of a circle uses the undefined term _______.
Which pair of undefined terms is used to define a ray?
Which is a property of an angle?
Which undefined term is used to define an angle?
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