Which is a property of an angle?
Which defines a circle?
Vertical line q goes through plane H in the center at point X. Line t comes out of point X. Lines r and s are parallel and are at a right angle to line q. Line p goes through lines r and s.

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

Which is the definition of a ray?
Which is the definition of a line segment?
Which undefined term is used to define an angle?
Which undefined term can contain parallel lines?
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