**Question of the day: How many ways can you find out that the different angles match to 180 degree?**

When I was posted this question by Dr Yeap, the only thing that came to my mind was "By using protractor". I couldn't thought of any other ways to measure the different angles. However, 30 brains are better than 1 brain. The class started brainstorming different ways to find out the answer.

**Answer:**

- Use a protractor.
- Tear out all the angles and put it together in a straight line (Because a straight line represent 180 degree).
- Identifying alternate angles on parallel lines.

The approaches that the class identified can be classified under the CPA approach.

C - Concrete

P - Pictorial

A - Abstract

**Challenge of the Day:**

**Try identifying which method is using the concrete approach and which method is using the abstract approach.**

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