🔢 Mathematics · Measurement

Perimeters of polygons

Solve problems involving perimeters of polygons: find perimeter from side lengths, find an unknown side length, and explore rectangles with same perimeter but different areas (or vice versa)

Typical age: 8–9 years

“If a rectangle has a perimeter of 24 cm and one side is 8 cm, can your child work out the length of the other side — without drawing it?”

0 / 3 mastered

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Needs first

Understanding angles (age 8+)
Area of rectangles supports exploring same-perimeter-different-area relationships
Measuring PerimetersREQUIRED
Measuring perimeter of simple shapes is prerequisite to perimeter problem solving

Unlocks next

Estimating answers (age 9+)REQUIRED
Y4 perimeter problems are prerequisite to applying perimeter formula
Perimeter of Compound ShapesREQUIRED
Y4 perimeter of polygons is prerequisite to composite rectilinear perimeter
Multi-Step Problem Solving
Perimeter problems exercise multi-step problem solving at age 8-9