Topic: Arc length and area of sector
Level: Secondary 3 Express
Blog Title: Mensuration (http://missong2007.blogspot.com/)
Purpose:
To arouse interest in the topic
Description of Activity:
An authentic problem-solving question
How the blog is used:
Scenario
- The MRT (Mass Rapid Transit) system forms the backbone of the railway system in Singapore with a network spanning the entire city-state.
- The system includes tunnels that run underground.
- This is a typical underground MRT tunnel.
- To ensure that the trains travel through the tunnel safely, the engineer has to know
(1) the perimeter of the wall,
(2) the cross-sectional area of the tunnel.
Task
- Suppose that you are the engineer, how would you find the
(1) the perimeter of the wall,
(2) the cross-sectional area of the tunnel. - What would you ask so that you will understand the Problem better?
Enter your questions under Comments.
Yes, it includes pictures.
Contributed by: Ong Lu Lu (St.Hilda's Secondary School) & Ang Ghim Chee (Gan Eng Seng School)
7 comments:
Very good way of creating interest among pupils on a dry topic like Mensuration.
This is a good method of learning for visual learners who cannot grasp the topic in class.
Good linkage between a real life scenario (MRT tunnels) and a mathematical topic. Kudos
A real-life problem ! Will the students be given the dimensions of the tunnel ?
Interesting use of real life examples incorporated in the blog to relate to the topic.
good idea to use the mrt example. it is practical and real.
Some suggestions:
At the beginning of the task, it provides opportunities for pupils to ask questions to surface information that they need if they are the engineer to work on the tunnel - this could possibly link them to terms related to circle.
This could be followed by the questions that already factored into the question.
An interesting way to bring in the NE component :D
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