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Formulas and Circles

Quiz by Andrew Watts

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17 questions
Show answers
  • Q1

    What is the formula for the circumference of a circle?

    2\pi r

    2\pi r^2

    d\pi r

    \pi r^2

    30s
  • Q2

    What is the formula for the circumference of a circle?

    A=2r\pi

    C=2r+\pi

    C=\pi d

    C=\frac{1}{2}\pi d

    30s
  • Q3

    What does the prefix "Circum" mean?

    To go around

    The radius of something

    A Circle

    All of something

    30s
  • Q4

    What is the formula for diameter of a circle?

    r\cdot2

    r\div2

    2rd

    r^2

    30s
  • Q5

    How many squares fit inside a circle?

    3.14 x r^2

    3.14

    \pi r

    d\times2

    30s
  • Q6

    What is the formula for the area of a circle?

    A=\frac{C}{2}\cdot r

    A=\pi\cdot3.14r

    C=\frac{r}{2}\cdot\pi

    A=3.14d

    30s
  • Q7

    What is the formula for the area of a rectangle?

    \frac{C}{2}\times width

    length\ \div width

    length\ \times width

    2\times length\ \times width

    30s
  • Q8

    What is the formula for the perimeter of a rectangle?

    l\cdot w

    l+l+l+l

    2w\times2l

    2\ \times\left(l\ +w\right)

    30s
  • Q9

    What is a squared number?

    A number multiplied by its self 2 times.

    A number multiplied by 2.

    A number that adds itself 2 times.

    A number multiplied by itself.

    30s
  • Q10
    30s
  • Q11

    Which number is not a perfect square?

    82

    121

    49

    64

    30s
  • Q12

    How many diameters are in a circle's perimeter?

    3.14

    d=2

    \pi r^2

    6.28

    30s
  • Q13

    In the image what is a chord?

    Question Image

    ab

    od

    oe

    cd

    30s
  • Q14

    In the image what is a radius? 

    Question Image

    oc

    cd

    ab

    oe

    30s
  • Q15

    This is the diameter of a circle.

    Question Image
    false
    true
    True or False
    30s

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