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Grade 8 - Mathematics
3.36 Area of a Sector - II

Example:
The arc of a sector whose radius is 9cm. is 15 cm. Find its area.

Solution:
A = lr/2
Given that,
l = 15cm. and r = 9cm.
A = (15 * 9)/2
A = 135/2
A = 67.5 Sq. cm.


Directions: Solve the following problems and correct the answer at two decimal place. Also write at least ten examples of your own.
Q 1: The arc of a sector whose radius is 6.4 cm. is 10.8 cm. Find its area.
34.56 Sq. cm.
None of these
34 Sq. cm.

Q 2: The arc of a sector whose radius is 9 cm. is 16 cm. Find its area.
72.5 Sq. cm.
72 Sq. cm.
None of these

Q 3: The arc of a sector whose radius is 10.4 cm. is 18.8 cm. Find its area.
None of these
97 Sq. cm.
97.76 Sq. cm.

Q 4: The arc of a sector whose radius is 7 cm. is 20 cm. Find its area.
70 Sq. cm.
None of these
70.5 Sq. cm.

Q 5: The arc of a sector whose radius is 8.9 cm. is 15.9 cm. Find its area.
None of these
70.76 Sq. cm.
70 Sq. cm.

Q 6: The arc of a sector whose radius is 7 cm. is 18 cm. Find its area.
63 Sq. cm.
None of these
63.5 Sq. cm.

Q 7: The arc of a sector whose radius is 9.6 cm. is 16.7 cm. Find its area.
80 Sq. cm.
80.16 Sq. cm.
None of these

Q 8: The arc of a sector whose radius is 5 cm. is 15 cm. Find its area.
None of these
37.5 Sq. cm.
37 Sq. cm.

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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