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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
9.9 Circumference of a Circle - I

Example:
The diameter of a circle is 21 cm. Find its circumference.

Solution:
Given that,
Diameter (d) = 21 cm.
The circumference of the circle = pd.
We know the value of p = 22/7
Circumference = 22/7 * 21
= 22 * 3
= 66 cm.


Directions: Read the above example carefully and answer the following questions.
  • Draw 10 different circles. Find the circumference of each circle by using the formula and by using a thread.


Q 1: The diameter of a circle is 5.25 cm. Find its circumference.
20.5 cm
19.5 cm
18 cm
16.5 cm

Q 2: The diameter of a circle is 35 cm. Find its circumference.
90 cm
120 cm
100 cm
110 cm

Q 3: Find the diameter of a circle if its circumference is given by 55 cm.
14.5 cm
8.5 cm
17.5 cm
6.5 cm

Q 4: Find the radius of a circle if its circumference is given by 219.91 cm.
40 cm
46 cm
36 cm
35 cm

Q 5: The radius of a circle is 225 cm. Find its circumference.
94.25 cm
86.30 cm
105.25 cm
90.28 cm

Q 6: Find the radius of a circle if its circumference is given by 140p cm.
140 cm
70 cm
160 cm
120 cm

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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