Measurement: Length, Mass, and Volume · Semester 1

Perimeter of Composite Figures

Students will calculate the perimeter of composite 2D figures involving combinations of rectangles, triangles, and other polygons.

Key Questions

  1. How can you break down a complex shape to find its perimeter?
  2. Explain the importance of identifying all side lengths, including those not explicitly given.
  3. Analyze real-world applications where calculating the perimeter of composite figures is necessary.

MOE Syllabus Outcomes

MOE: Measurement and Geometry - S1MOE: Area and Perimeter - S1
Level: Primary 3
Subject: Mathematics
Unit: Measurement: Length, Mass, and Volume
Period: Semester 1

Suggested Methodologies

Collaborative Problem-Solving

Structured group problem-solving with defined roles

25–50 min

Learn more about Collaborative Problem-Solving

Think-Pair-Share

Individual reflection, then partner discussion, then class share-out

10–20 min

Learn more about Think-Pair-Share

Flipped Classroom

Pre-learn at home, apply and deepen in class

30–55 min

Learn more about Flipped Classroom

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More in Measurement: Length, Mass, and Volume

Units of Measurement and Conversion (Length)

Students will review and apply conversions within the metric system for length (mm, cm, m, km) and solve problems involving different units.

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Area of Triangles and Parallelograms

Students will derive and apply formulas for the area of triangles and parallelograms.

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Area of Composite Figures

Students will calculate the area of composite 2D figures by decomposing them into simpler shapes.

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Volume of Cubes and Cuboids

Students will calculate the volume of cubes and cuboids using the formula length × width × height, and understand units of volume.

3 methodologies

Surface Area of Cubes and Cuboids

Students will calculate the surface area of cubes and cuboids by finding the sum of the areas of all their faces.

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