Oriented and unoriented angles of lines and rays

Sketch 1

• Trace the locus of the point M viewing AB under the angle a given in the upper right corner. You may use the green point to trace only points close to the locus. The closer B is to the green point, the better the accuracy is.
• What kind of angle do you use in this sketch?
  
  
  
• We suppose that the screen is oriented. To what set belongs the measure of angle a?
  
  
  
• Clear the screen and draw the locus of M for measure of angle a close to p/6 + 2pZ.

Sketch 2

• Trace the locus of the point M viewing AB under the angle a given in the upper right corner. You may use the green point to trace only points close to the locus. The closer B is to the green point, the better the accuracy is.
• What kind of angle do you use in this sketch?
  
  
  
• We suppose that the screen is oriented. To what set belongs the measure of angle a?
  
  
  
• Clear the screen and draw the locus of M for measure of angle a close to p/6.

Sketch 3

• Trace the locus of the point M viewing AB under the angle a given in the upper right corner. You may use the green point to trace only points close to the locus. The closer B is to the green point, the better the accuracy is.
• What kind of angle do you use in this sketch?
  
  
  
• We suppose that the screen is oriented. To what set belongs the measure of angle a?
  
  
  
• Clear the screen and draw the locus of M for measure of angle a close to p/6 + pZ.

Sketch 4

• Trace the locus of the point M viewing AB under the angle a given in the upper right corner. You may use the green point to trace only points close to the locus. The closer B is to the green point, the better the accuracy is.
• What kind of angle do you use in this sketch?
  
  
  
• We suppose that the screen is oriented. To what set belongs the measure of angle a?
  
  
  
• Clear the screen and draw the locus of M for measure of angle a close to p/6.