7th
grade

Mathematics

70%

accuracy

105

plays

Monica Martinez

4 years

Mathematics

7th

grade

Ratios and Pi

Monica Martinez

105
plays

10 questions

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1. Multiple Choice
2 minutes
1 pt
Which of the following formulas do we use to find the Circumference of a circle when given the radius?
$C\ =\ \pi d$
$C\ =\ 2\pi r$
$A\ =\ \pi r^2$
$C\ =\ \pi r^2$
2. Multiple Choice
2 minutes
1 pt
Which of these best describes $\pi?$
The square root of the area of a circle.
The ratio of the radius of a circle to its diameter.
The radius of a circle times 3.14.
The ratio of the circumference of a circle to its diameter.
3. Multiple Choice
2 minutes
1 pt
Which of the following equations represents the relationship between the circumference, C, and the diameter, d, of any circle?
$C\ =\ \pi r$
$Cd\ =\pi$
$\pi=\ \frac{C}{r}$
$\pi=\frac{C}{d}$
4. Multiple Choice
1 minute
1 pt
What number is pi?
1.41
3.14
2
5.14
5. Multiple Choice
1 minute
1 pt
Which of these ratios is the closest approximation of pi?
$\frac{13}{4}$
$\frac{19}{6}$
$\frac{16}{5}$
$\frac{22}{7}$
6. Multiple Choice
1 minute
1 pt
_______________ is the distance around a circle.
circumference
radius
center
diameter
7. Multiple Choice
1 minute
1 pt
_____________ is half of the diameter
circumference
radius
center
diameter
8. Multiple Choice
1 minute
1 pt
______________ is twice the radius
circumference
radius
center
diameter
9. Multiple Choice
1 minute
1 pt
If the radius of a circle is 12.5 meters, the diameter is _
6.25 meters
25 meters
125 meters
50 meters
10. Multiple Choice
1 minute
1 pt
If the diameter of a circle is 50 yards, the radius is ______.
100 yards
150 yards
25 yards
15 yards
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