 31. The midpoint circle drawing algorithm also uses the __of the circle to generate? a. two-way symmetry b. four-way symmetry c. both (a) and (b) d. eight-way symmetry

 32. A polygon in which the line segment joining any 2 points within the polygon lies completely inside the polygon is called__? a. convex polygon b. concave polygon c. both (a) and (b) d. none of these

 33. A polygon in which the line segment joining any 2 points within the polygon may not lie completely inside the polygon is called __? a. convex polygon b. concave polygon c. both (a) and (b) d. none of these

 34. The process of selecting and viewing the picture with different views is called_______________ a. Windowing b. clipping c. both (a) and (b) d. projecting

 35. In two dimensional viewing we have? a. 2D window and 3D viewport b. 2D window and 2D viewport c. 3D window and 2D viewport d. 3D window and 3D viewport
 Answer: (c).3D window and 2D viewport

 36. The first viewing parameter we must consider is the? a. view reference plane b. view reference point c. viewing window d. shift vector

 37. The line segment from the view plane to the view reference point is called_____________ a. view-distance b. view-path c. both (a) and (b) d. Projection distance