Fill in the blanks. Any drawing (straight or non-straight) done without lifting the pencil may be a P . A Q is the one that does not cross itself. A curve is said to be R . if its ends are joined. A S is a simple closed curve made up of line segments.

• A. P Q R S Curve Open curve Closed Line
• B. P Q R S Line Curve Open Line
• C. P Q R S Curve Simple curve Closed Polygon
• D. P Q R S Curve Closed curve Open Circle