Teaching Area & Teaching Area & PerimeterPerimeter

Teaching Area & Teaching Area & PerimeterPerimeter

Grade 7 and 8Grade 7 and 8

Mensuration in Curriculum

• Build on key concept covered in Grade 1 – 6.

• Formulate reasoning for formulae areas of triangle, parallelogram and trapezium base on area of rectangle.

Lesson Planning:• Understanding students’ prior

knowledge.• Making known learning outcome clearly

to students.• Assimilate students understanding of

the topic by asking questions.• Developmental of lesson

– Concrete– Pictorial– Abstract

• Assessment• Conclusion

Brain Teaser 1

You are given a square piece of paper. Without measuring, what can you do to obtain a perfect square half the area of its original?

Brain Teaser 2

A farmer challenges an engineer, a physicist, and a mathematician to fence off the largest amount of area using the least amount of fence.

The engineer made his fence in a circle and said it was the most efficient.

The physicist made a long line and said that the length was infinite. Then he said that fencing half of the Earth was the best.

The mathematician laughed at the others and with his design, beat the others. What did he do?

Rational

• Understand the meaning of area.

• Understand the relationship between length and area.

Rational

• Assess student’s application on formulae for area and perimeter of different shapes.

• National Education/ general knowledge on places.

Reflection

• 3 new ideas I have after today’s lesson

• 2 things you would like to try

• 1 question I still have