Perimeter of Composite Figures
Calculating the perimeter of complex shapes involving straight lines and curved arcs.
Key Questions
- Construct a strategy for systematically calculating the perimeter of any composite figure.
- Explain how to identify which segments contribute to the perimeter and which do not.
- Critique common mistakes made when calculating the perimeter of shapes with curved edges.
MOE Syllabus Outcomes
Suggested Methodologies
Ready to teach this topic?
Generate a complete, classroom-ready active learning mission in seconds.
Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
More in Circles and Area
Circle Terminology and Pi
Identifying radius, diameter, circumference, and understanding the constant pi (π) as a ratio.
2 methodologies
Circumference of a Circle
Calculating the circumference of circles and semi-circles using the formula C = πd or C = 2πr.
2 methodologies
Area of Circles
Deriving and applying the formula for the area of a circle (A = πr²).
2 methodologies
Area of Composite Figures
Finding the area and perimeter of complex shapes made of rectangles, triangles, and circles/semi-circles.
2 methodologies