# Formulas and Circles

## Quiz by Andrew Watts

Feel free to use or edit a copy

includes Teacher and Student dashboards

### Measure skillsfrom any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet

- Q1
What is the formula for the circumference of a circle?

$2\backslash pi\; r$

$2\backslash pi\; r^2$

$d\backslash pi\; r$

$\backslash pi\; r^2$

30s - Q2
What is the formula for the circumference of a circle?

$A=2r\backslash pi$

$C=2r+\backslash pi$

$C=\backslash pi\; d$

$C=\backslash frac\{1\}\{2\}\backslash pi\; d$

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?

$r\backslash cdot2$

$r\backslash div2$

$2rd$

$r^2$

30s - Q5
How many squares fit inside a circle?

3.14 x $r^2$

3.14

$\backslash pi\; r$

$d\backslash times2$

30s - Q6
What is the formula for the area of a circle?

$A=\backslash frac\{C\}\{2\}\backslash cdot\; r$

$A=\backslash pi\backslash cdot3.14r$

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

$A=3.14d$

30s - Q7
What is the formula for the area of a rectangle?

$\backslash frac\{C\}\{2\}\backslash times\; width$

$length\backslash \; \backslash div\; width$

$length\backslash \; \backslash times\; width$

$2\backslash times\; length\backslash \; \backslash times\; width$

30s - Q8
What is the formula for the perimeter of a rectangle?

$l\backslash cdot\; w$

$l+l+l+l$

$2w\backslash times2l$

$2\backslash \; \backslash times\backslash left(l\backslash \; +w\backslash right)$

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 - Q1030s
- 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

$d=2$

$\backslash pi\; r^2$

6.28

30s - Q13
In the image what is a chord?

ab

od

oe

cd

30s - Q14
In the image what is a radius?

oc

cd

ab

oe

30s - Q15
This is the diameter of a circle.

falsetrueTrue or False30s