Loci

• What tool is used to draw arcs in constructions?

  A pair of compasses
• What does the term 'perpendicular' mean?

  At a right angle to
• How are angles measured?

  Using degrees (°)
• What is the first step in constructing an angle of 60°?

  Draw a straight line
• Where do you place the pin of the compasses to draw the first arc for a 60° angle?

  At any point on the line
• What do you do after drawing the first arc in constructing a 60° angle?

  Draw another arc at the intersection
• How do you finish constructing a 60° angle?

  Draw a line through the intersection of arcs
• What is the first step to construct an angle of 30°?

  Construct an angle of 60°
• What is the relationship between angles of 60° and 30°?

  30° is half of 60°
• How do you construct an angle of 90°?

  Construct a perpendicular bisector
• What is the method to construct an angle of 45°?

  Bisect an angle of 90°
• What does the term 'bisect' mean?

  To divide in half
• What is the first step to bisect a line?

  Open compasses greater than half the line
• What do you do after placing the pin at one end of the line when bisecting?

  Draw arcs above and below the line
• How do you complete the construction of a perpendicular bisector?

  Draw a line connecting the intersection points
• What is the first step to bisect an angle?

  Draw arcs that cross the two lines
• How do you finish bisecting an angle?

  Draw a line through the intersection of arcs
• What can a pair of compasses be used for?

  Several constructions
• What is the locus of points equidistant from two non-parallel lines?

  The angle bisector of the two lines
• How do you construct the locus of points equidistant from two lines?

  Construct the angle bisector of the lines
• What is the first locus to learn for GCSE Mathematics?

  The locus of points from one point
• What does the locus of points that are 3 cm from point A represent?

  A circle centered at A with radius 3 cm
• What forms the perpendicular bisector of the line from A to B?

  The set of points equidistant from A and B
• How do you draw the locus of points that are 4 cm from line AB?

  Draw parallel lines 4 cm away from AB
• What is the plural of the word locus?

  Loci
• What is a locus?

  A set of points satisfying a rule
• What can points in a locus form?

  A line, curve, or region