Cross Sections of 3D Figures
Describing the 2D cross sections that result from slicing three-dimensional solids.
Key Questions
- Predict what 2D shapes can be created by slicing a cube at different angles.
- Explain how cross sections help doctors or engineers see inside solid objects.
- Justify why the shape of a cross section changes depending on whether the slice is parallel or perpendicular to the base.
Ontario Curriculum Expectations
Suggested Methodologies
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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.
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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.
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