AQA · Mathematics · 8300
GCSE Maths: Circles: perimeter – quarter-circle
Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths practice questions for Circles: perimeter – quarter-circle (Corbettmaths Video 62), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.
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What two components make up the perimeter of a semicircle?
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The curved arc (half the circumference of the full circle) plus the straight diameter.
What three components make up the perimeter of a quarter-circle?
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The curved arc (one-quarter of the full circumference) plus two straight radii.
What fraction of a full circle's circumference is the arc of a semicircle?
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One half (1/2)
What fraction of a full circle's circumference is the arc of a quarter-circle?
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One quarter (1/4)
In a running track with two straights and two semicircular bends, what complete shape do the two semicircular bends form together?
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One complete circle. Two semicircles combine to make a full circle.
If a semicircle has diameter 8cm, what is the radius?
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4cm. The radius is half the diameter.
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