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Geometry - Circles

Quiz by Shane Erlandson

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Q 1/20
Score 0
If the radius of a circle is 4 cm, what is the diameter of the circle?
29
8 cm
12 cm
2 cm
16 cm

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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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