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Areas Related to Circles
NCERT Exemplar
CBSE
Grade 10
Question:
Area of a sector of a circle of radius $r$ with central angle $\theta$ is: (a) $\dfrac{\theta}{180^\circ} \times \pi r^2$ (b) $\dfrac{\theta}{360^\circ} \times \pi r^2$ (c) $\dfrac{\theta}{180^\circ} \times 2\pi r$ (d) $\dfrac{\theta}{360^\circ} \times 2\pi r$
Step-by-Step Solution
Key Concept: Standard formula for sector area.
Sector Area $= \dfrac{\theta}{360^\circ} \pi r^2$. [1.0 Mark]
--- 🎯 Official CBSE Marking Scheme: Standard formula recall: 1.0 Mark