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13 cards from this deck
3D shape with same cross-section throughout its length
Area of cross-section × Length
Identify the cross-section
12(a+b)h\frac{1}{2}(a+b)h21(a+b)h where a,ba,ba,b are parallel sides
12×base×height\frac{1}{2} \times \text{base} \times \text{height}21×base×height
Add together areas of all faces
Two end faces (cross-sections) + all rectangular side faces
Cubic units (e.g., cm³, m³)
Square units (e.g., cm², m²)
Use reverse process to find missing dimension
Show all your working for partial marks
Forgetting to include hidden faces
Stacking identical cross-sections along length
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