46
Understand perimeter as boundary length
Explain perimeter as the total length around a shape.
Chapter route
Perimeter and Area
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47
Calculate perimeter of rectangles and squares
Use side lengths to find perimeter of rectangles and squares.
48
Find missing side from perimeter
Find an unknown side length when perimeter and other sides are known.
49
Understand area as surface covered
Explain area using unit squares and grids.
50
Calculate area of rectangles and squares
Use length and breadth to calculate rectangular area.
51
Compare areas of shapes on grids
Count or compare unit squares to compare areas.
52
Solve real-life perimeter problems
Apply perimeter in fencing, borders and walking-around contexts.
53
Solve real-life area problems
Apply area in tiling, painting, covering or field contexts.
54
Decompose composite shapes
Split simple composite shapes into rectangles to find area or perimeter.
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