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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
9.22 The Area of a Sector - II

Example:
The length of an arc of a sector whose radius is 8 cm, is 10 cm. Find its area.

Solution:
Given that,
l = 10 cm, and r = 8 cm.
Formula A = lr/2
Therefore, A = (10 * 8) / 2
A = 80 / 2
A = 40 sq cm.


Directions: Read the above example carefully and answer the following questions. Also make 10 examples of your own.
Q 1: A sector has radius is 8 cm. Find the length of an arc of the sector if its area is given by 480 sq cm.
120 cm
160 cm
180 cm
120 cm

Q 2: The length of an arc of a sector is 24.5 cm. Find the radius if the area of the sector is given by 128.63.
13.5 cm
12.5 cm
10.5 cm
18.5 cm

Q 3: A sector has radius is 15 cm. Find the length of an arc of the sector if its area is given by 1125 sq cm.
125 cm
112 cm
121 cm
150 cm

Q 4: The length of an arc of a sector whose radius is 28 cm, is 132 cm. Find its area.
1848 sq cm
1849 sq cm
1346 sq cm
1263 sq cm

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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