Question:

Radius of a sector of a circle is \( 3.5 \, \text{cm} \) and length of its arc is \( 2.2 \, \text{cm} \). Find the area of the sector.

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To calculate the area of a sector, use \( \text{Area} = \frac{1}{2} \times r \times \text{arc length} \) directly if the arc length is given.
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Solution and Explanation

Step 1: The area of the sector is given by: \[ \text{Area of sector} = \frac{1}{2} \times r \times \text{arc length}. \] Step 2: Substituting \( r = 3.5 \, \text{cm} \) and \( \text{arc length} = 2.2 \, \text{cm} \): \[ \text{Area of sector} = \frac{1}{2} \times 3.5 \times 2.2 = 3.85 \, \text{cm}^2. \]
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