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Circles: Circumference & Area

PROCEDURAL
MathematicsGeometry|Ages 12—14|ID: mt_svFa6_mjO_

Calculate the circumference and area of circles using the formulae C = πd (or 2πr) and A = πr², and solve problems involving perimeters and areas of composite shapes that include circular parts

Mastery Evidence

  • Calculate the circumference and area of a circle given its radius or diameter
  • Find the perimeter or area of a composite shape made from rectangles and semicircles
  • Explain the relationship between π, diameter, and circumference informally

Assessment Prompt

“If [child] wants to know how far a bicycle wheel travels in one full rotation, can they use the diameter of the wheel and π (pi) to work out the circumference?”

Curriculum Standards2 alignments

7.G.4Common Core State Standards for Mathematics
Know the formulas for the area and circumference of a circle

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

G
KS3.Maths.Geo.2The national curriculum in England
Perimeters and Areas of Circles and Composite Shapes

calculate and solve problems involving: perimeters of 2-D shapes (including circles), areas of circles and composite shapes

Mathematics · Key Stage 3

Prerequisites2

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