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Geometry - Circles

Quiz by Shane Erlandson

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20 questions
Show answers
  • Q1
    If the radius of a circle is 4 cm, what is the diameter of the circle?
    8 cm
    12 cm
    2 cm
    16 cm
    30s
  • Q2
    If the diameter of a circle is 14 cm, what is the radius?
    21 cm
    28 cm
    10 cm
    7 cm
    30s
  • Q3
    What is the formula to calculate the circumference of a circle if the radius is given?
    \pi d
    \pi r^2
    r^2 \pi
    2 \pi r
    30s
  • Q4
    If the diameter of a circle is 10 cm, what is the radius?
    5 cm
    10 cm
    20 cm
    2.5 cm
    30s
  • Q5
    If a circle has a diameter of 14 cm, what is its circumference?
    44 \text{ cm}
    88 \text{ cm}
    22 \text{ cm}
    28 \text{ cm}
    30s
  • Q6
    What is the area of a circle with a diameter of 10 cm?
    31.4 square cm
    50 square cm
    25 square cm
    78.5 square cm
    30s
  • Q7
    A circle has a diameter of 12 cm. What is the radius?
    24 cm
    12 cm
    6 cm
    3 cm
    30s
  • Q8
    What is the diameter of a circle with a radius of 8 cm?
    16 cm
    24 cm
    8 cm
    4 cm
    30s
  • Q9
    What is the area of a circle with a radius of 7 inches? (Use π ≈ 3.14)
    21.98 square inches
    100.48 square inches
    153.86 square inches
    43.96 square inches
    30s
  • Q10
    If a circle has a radius of 3 cm, what is the circumference? (Use π ≈ 3.14)
    28.26 cm
    12.56 cm
    9.42 cm
    18.84 cm
    30s
  • Q11
    If the diameter of a circle is 12 inches, what is its radius?
    24 inches
    3 inches
    12 inches
    6 inches
    30s
  • Q12
    What is the area of a circle with a diameter of 14 cm? (Use π ≈ 3.14)
    78.5 square cm
    100.48 square cm
    153.86 square cm
    49 square cm
    30s
  • Q13
    30s
  • Q14
    30s
  • Q15
    30s

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