I taught my E-Math class on 'How to Construct Angle and Perpendicular Bisector', a skill learnt in lower Secondary and forgotten by many Secondary fours.

You must know the steps. I'm so glad that when I found something really useful which shows the step-by-step. It's like a 'live demo'.

You must definitely check out this website on construction:

**Angle Bisector**: http://www.mathopenref.com/constbisectangle.html

**P****erpendicular Bisector**: http://www.mathopenref.com/constbisectline.html

On top of these 2 skills, I suggest the following as well which could be tested together in a question.

- Concepts of bearing
- Angle properties of Circle
- Construction of quadrilaterals
- Special properties of quadrilateral eg Do you know the diagonals of a kite intersect at 90 degrees?