Lesson G9

G9 Circle definitions and properties Quiz: AQA Maths, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson G9, Circle definitions and properties: 20 multiple choice questions for the AQA GCSE Maths (8300), Unit 4: Geometry and measures, written with Revision Ninja.

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The 20 questions

  1. What is the distance from the centre of a circle to its circumference?

    • Circumference
    • Diameter
    • Chord
    • Radius

  2. What is a chord that passes through the centre of a circle called?

    • Arc
    • Diameter
    • Radius
    • Tangent

  3. What is the name for the boundary of a circle?

    • Sector
    • Circumference
    • Diameter
    • Segment

  4. What is the part of a circle bounded by two radii and an arc called?

    • Sector
    • Segment
    • Chord
    • Arc

  5. What is the region between a chord and the arc it cuts off called?

    • Tangent
    • Radius
    • Sector
    • Segment

  6. What is a line that touches a circle at exactly one point called?

    • Diameter
    • Tangent
    • Chord
    • Secant

  7. A circle has a radius of 6 cm. What is its diameter?

    • 6 cm
    • 3 cm
    • 36 cm
    • 12 cm

  8. A circle has a radius of 4.5 cm. What is its diameter?

    • 4.5 cm
    • 18 cm
    • 9 cm
    • 2.25 cm

  9. What does a chord join?

    • Two points on the circumference
    • The centre to the circumference
    • Two points inside the circle only
    • A point on the circumference to a tangent

  10. Which line is the longest chord in a circle?

    • A tangent
    • The diameter
    • An arc
    • The radius

  11. How many points does a tangent share with the circle?

    • Two
    • One
    • Infinitely many
    • None

  12. Which of these is an arc of a circle?

    • A part of the circumference
    • A line from the centre to the edge
    • A line touching the circle at one point
    • The region inside a chord

  13. What is a line segment with both ends on the circumference called?

    • Radius
    • Chord
    • Tangent
    • Sector

  14. A sector has an angle of 90 degrees at the centre. What fraction of the circle does it cover?

    • One eighth
    • One third
    • One quarter
    • One half

  15. A circle has centre O and radius 7 cm. A chord AB is 14 cm long and passes through O. What is AB?

    • It is a radius
    • It is a diameter
    • It is an arc
    • It is a tangent

  16. What is the relationship between a radius and a tangent at their point of contact?

    • They are parallel
    • They are perpendicular
    • They are equal in length to the chord
    • They bisect each other

  17. Which ratio is the circumference divided by the diameter?

    • 0.5
    • 2
    • π
    • 2π

  18. How many radii can be drawn in a circle?

    • One
    • Infinitely many
    • Two
    • Four

  19. A circle has a diameter of 16 cm. What is its radius?

    • 16 cm
    • 8 cm
    • 32 cm
    • 4 cm

  20. What do concentric circles have in common?

    • The same circumference
    • The same tangent
    • The same centre
    • The same radius

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