GCSE Secondary Maths Age 13-17 - Geometry & Measures: Construction - Explained

The video tutorial explains how to construct the perpendicular bisector of a line segment using a ruler and compasses. It emphasizes the importance of showing all construction lines to avoid losing marks. The tutorial provides step-by-step instructions on using a compass to draw arcs and a ruler to connect intersection points, forming the bisector. It also discusses scoring criteria and alternative methods if a compass is unavailable.

What equipment is essential for constructing the perpendicular bisector of a line segment?

• Ruler and set square

• Ruler and protractor

• Ruler and compasses

• Protractor and compasses

What is the first step in constructing the perpendicular bisector of a line segment?

• Open the compass to the length of the segment

• Draw a circle with the segment as the diameter

• Draw a line parallel to the segment

• Open the compass to more than half the length of the segment

Where should the compass point be placed to draw the arcs for the perpendicular bisector?

• At a random point on the segment

• At the midpoint of the segment

• At one end of the segment

• At both ends of the segment

What is the consequence of erasing construction lines after drawing the perpendicular bisector?

• You will lose valuable marks

• You will gain extra marks

• You will need to redraw the lines

• It will not affect your marks

How many marks can you earn for correctly constructing the perpendicular bisector with visible construction lines?

• Four marks

• Three marks

• Two marks

• One mark