Menu Construction 1a Construct a triangle (ASA) Construction 1a Construct a triangle (ASA) Construction 1b Construct a triangle (SAS) Construction 1b Construct a triangle (SAS) Construction 2 Construct the bisector of an angle Construction 2 Construct the bisector of an angle Construction 3 Construct the perpendicular bisector of a line segment. Construction 3 Construct the perpendicular bisector of a line segment.

 Draw a line segment [qr] 8cm in length. Name the points and mark the length. |qr|=8cm 46° 52° p rq At q using a protractor mark and draw an angle of 52 o. At r mark and draw an angle of 46 o Mark the point of intersection of the two angles. This is the point p. END OF CONSTRUCTION

65° ba c ab=12cm ac=9cm Menu Quit END OF CONSTRUCTION Draw a line segment 12cm in length. Name the points and mark the length. Use a protractor to draw a line at 65 o to |ab|. Use a compass with a as centre and 9cm radius to draw an arc on this line. Mark the point of intersection c. Join c to b and complete labels.

 Draw the angle aob.  Using the vertex o as centre draw an arc to meet the arms of the angle at x and y.  Using x as centre and the same radius draw a new arc.  Using y as centre and the same radius draw an overlapping arc.  Mark the point where the arcs meet.  The bisector is the line from o to this point. y x o a b x x Menu Quit END OF CONSTRUCTION

 Draw the line segment ab Menu Quit END OF CONSTRUCTION Using a as centre and a radius greater than half |ab| draw an arc. Using b as centre and the same radius draw another arc. Draw a line through the points where the arcs cross.

 Ms.S.Saifee