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## Circle Calculations

1.
A rose garden is in the shape of a circle with a circumference of approximately 37.7 feet. 11.8 is closest to the diameter of the rose garden. (Use 3.14 for pi).
1. True
2. False
2.
A square is inscribed in a circle with a radius of 5 cm. Each vertex of the square lies on the circle. Therefore, the area of the square is 75 sq. cm.
1. True
2. False
3.
Use 3.14 for $pi$. If the diameter of a circle is 28.1 yd, what is the circumference of the circle?
1. 44.1 yd
2. 176.5 yd
3. 25.0 yd
4. 88.2 yd
4.
Use 3.14 for $pi$. Find the circumference of a circle when the diameter is 3.5 m.
1. 5.5 m
2. 11.0 m
3. 22.0 m
4. 34.5 m
5.
Find the circumference of a circle with a radius of 6 inches. (Use 3.14 for Pi)
1. 37.68 inches
2. 18.84 inches
3. 9.42 inches
4. 9.14 inches
6.
Given a radius is 6.1 mm and use 3.14 for $pi$, what is the circumference of the circle?
1. 19.2 mm
2. 9.6 mm
3. 38.3 mm
4. 60.1 mm
7.
Given the radius of a circle is 8.6 cm and using 3.14 for $pi$, the circumference of the circle is                .
1. 13.5 cm
2. 54.0 cm
3. 27.0 cm
4. 84.8 cm
8.
The circle has an area of 120.8 m squared. What is the circumference of the circle?
1. 6.2 m
2. 39.0 m
3. 19.5 m
4. 46.2 m
9.
Suppose you are constructing a circle graph. If you have a central angle that measures 120 degrees, what percent of the whole does the central angle represent?
1. 33.3%
2. 30%
3. 50%
4. 66.7%
10.
Suppose you are constructing a circle graph. What is the angle measure of a piece that represents 40% of the total?
1. 40 degrees
2. 144 degrees
3. 100 degrees
4. 360 degrees
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