# E-Math: How to Construct Angle and Perpendicular Bisector 'Live Demo'

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

Perpendicular 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
• Special properties of quadrilateral eg Do you know the diagonals of a kite intersect at 90 degrees?

### Ai Ling Ong

Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)