Sector
A sector is a region of a circle enclosed by two radii and the arc lying between them. It visually resembles a slice of pie or pizza cut from the center of the circle.
Example
For a circle with radius $r = 7 \text{ cm}$ and a central angle $\theta = 60^\circ$, the area of the sector is calculated using the formula: $\text{Area} = \frac{\theta}{360^\circ} \times \pi r^2 = \frac{60}{360} \times \frac{22}{7} \times 7^2 = \frac{1}{6} \times 154 \approx 25.67 \text{ cm}^2$.