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

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

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

Question 2: This question is available to subscribers only!

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