A-Maths: Plane Geometry Question (Step-by-Step) [Video]


In this video, I will show you:

  • How to prove that 2 lines are // to each other
  • How to prove a pair of similar triangles
  • How to prove an equation involving length

Properties & Theorems used:

  • Angles in the same segment
  • Intercept Theorem
  • Corresponding angles
  • Tangent - Secant Theorem

Strategies (Used in manipulation in part iii) :

  • Breaking a longer length into smaller parts
  • 'Expansion' of length
  • Using result from earlier parts
  • Factorising common length

If you find this video, please subscribe to my YouTube Channel and share it with your friends!

Link to video: http://www.youtube.com/watch?v=UNZolJverww

Thank you!

Length of video = 11 minutes.

Related Post

What You Need To Know To Do Well In Plane Geometry - Part 1 Plane Geometry is the new topic added in the new syllabus. There are hardly any calculations but lots of proving to be done. We know students dislike...
A-Maths: Find Equation of Circle Given Tangent & Circle + More           Many students after reading the question take a long time to begin as they don't know how to sta...
E-Maths: Angle Properties of Circle Question In this video, I discuss on the methods to answer angle properties of circle. 2 items to mark out before answering the question. How to identify...
E-Maths: Introduction of Angle Properties of Circle (Basic) - Video This topic, Angle Properties of Circle is usually introduced in Secondary 3 Elementary Maths syllabus in Singapore.  It is a very visual topic in whic...
A-Maths: Plane Geometry (Geometrical Proof) Mastery Workshop + SPECIAL CODE Student 1: "I can't see!" Student 2: "I don't know how to start. I don't know which theorem or formula to use." Student 3: "I always can't do ...

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! :)

Leave a reply