Area of Rectilinear Figures
Students find the area of rectilinear figures by decomposing them into non-overlapping rectangles.
Key Questions
- Explain how to decompose a complex shape into simpler rectangles.
- Analyze how the area of the parts relates to the area of the whole figure.
- Design a strategy to find the area of an L-shaped figure.
Ontario Curriculum Expectations
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 Geometry and Spatial Systems
Attributes of Polygons
Students classify shapes based on sides, angles, and symmetry.
3 methodologies
Motion and Transformation: Flips and Slides
Students explore how shapes move through flips (reflections) and slides (translations).
3 methodologies
Motion and Transformation: Turns
Students explore how shapes move through turns (rotations) around a fixed point.
3 methodologies
Partitioning Shapes into Equal Areas
Students divide shapes into parts with equal areas and express the area of each part as a unit fraction.
3 methodologies
Understanding Area
Students are introduced to area as the amount of space a two-dimensional shape covers, measured in square units.
3 methodologies