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Worksheetsrevision of circle
Total questions: 10
Worksheet time: 21mins
π 的數值是多少？ What is the value of PI?
3
3.14
7/22
6.28
以下哪一條是直徑？Which of the following is a diameter?
BF
CF
OF
AF
上圖是由大小相同的圓形所組成，若每一個圓形的半徑是2.5 厘米，求WY 的長度。The figure is formed by the same circle and the radius of a circle is 2.5 cm. Find the length of WY.
15 cm
17.5 cm
12.5 cm
22.5 cm
若要繪出一個圓周為28.26 厘米的圓形，這個圓規的兩擘應調較至多少厘米？ If I want to draw a circle with the circumference of 28.26 cm, what is the distance between the pin and the pencil of a pair of compasses?
5 cm
4.5 cm
9 cm
10 cm
一個圓形的半徑為3厘米，它的圓周是多少？The radius of a circle is 3 cm. What is its circumference?
18.84 cm
25.12 cm
9.42 cm
6.28 cm
一個圓形的直徑是15 厘米，求它的圓周。The diameter of a circle is 15 cm. Find its circumference.
48 cm
47.1 cm
52.8 cm
55.7 cm
求上圖周界。Find the perimeter of the figure.
37.26 cm
14.13 cm
22 cm
23.13 cm
求上圖的周界。Find the perimeter.
31.4 cm
27.98 cm
28 cm
36.9 cm
子豪用一個滾輪量度走廊的長度，輪子轉動40 次時，剛好走了 40 米。滾輪的直徑是多少厘米？ (答案取一位小數) Billy uses a trundle wheel to measure the length of a corridor. The wheel rotates 40 times and the length measured is exactly 40 m. What is the diameter of the trundle wheel? ( Round off the answer to the nearest tenth.)
31.9 cm
31.8 m
31.8 cm
32.8 cm
薄餅的半徑是20 厘米。現把它分成 8 等份，每份薄餅的周界是多少厘米？The radius of the pancake is 20 cm. Now divide it into 8 equal parts, what is the perimeter of each part?
48.7 cm
52 cm
55.7 cm
15.7 cm
