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First Year maths · T.12 · Circles

Perimetre of a semicircle or quarter circle

Add the curved edge and the straight edges. Use π = 3.14.

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  1. A semicircle has a diameter of 32 cm. Find its perimeter in cm (the curved edge plus the straight edge). Use π = 3.14.

    Answer: 82.24

  2. A quarter circle has a radius of 36 cm. Find its perimeter in cm (the curved edge plus the two straight edges). Use π = 3.14.

    Answer: 128.52

  3. A semicircle has a diameter of 48 cm. Find its perimeter in cm (the curved edge plus the straight edge). Use π = 3.14.

    Answer: 123.36

Tip: Add the curved edge and the straight edges. Use π = 3.14.

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