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18 questions
What is circumference?
The distance around a circle.
The space inside the circle.
The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.
The line from the center of a circle to any point on its edge.
What is the area of a circle?
The distance around a circle.
The space inside the circle.
The length of the straight line segment that passes through the center of the circle and whose endpoints lie on the circle.
The line from the center of a circle to any point on its edge.
The formula for the circumference of a circle is...
$C\ =\ \pi d$
$C\ =\ \pi$
$C\ =\ \pi r$
$C\ =\pi r^2$
The formula for finding the area of a circle is...
$A\ =\ \pi d$
$A\ =\ \pi$
$A\ =\pi r$
$A\ =\pi r^2$
What is the diameter of this circle?
8cm
16cm
10cm
4cm
What is the radius of this circle?
18in
36in
9in
6in
Find the circumference of the circle
87.82in
153.86in
43.96in
307.72in
Find the area of the circle
43.96 units^{2}
153.86 units^{2}
87.82 units^{2}
307.72units^{2}
What is the area of this circle?
452.39 cm^{2}
139.12 cm^{2}
113.1 cm^{2}
84.23 cm^{2}
A jar lid has a diameter of 32 millimeters. What is the circumference of the lid to the nearest tenth?
100.5 mm
96.3 mm
115.6 mm
69.9 mm
The radius of Michael’s basketball rim is 8 inches. What is the circumference to the nearest hundredth?
25.12 in
50.27 in
12.56 in
48.15 in
The diameter of Joanne’s bicycle wheel is 18 inches. What is the circumference to the nearest tenth?
28.3 in
27 in
56.5 in
54 in
The circular fountain in front of the library has a radius of 8.8 feet. What is the circumference of the fountain to the nearest tenth?
55.3 ft
26.4 ft
48.8 ft
27.6 ft
If the word problem is asking you to find the space inside the circle, which formula should you use?
r = d/2
d = 2r
C = πd
A = πr²
Which formula would you use to answer: Lauren's bicycle tire has a diameter of 20 inches. How many inches is one full revolution of the wheel?
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