alleryIn finding sector area by the unitary method, the whole circular region is treated as a sector of what angle?
A180°
B90°
C270°
D360°
Answer & Solution
Correct answer: D. 360°
1. The entire circular region goes round the centre once.
2. One full turn at the centre is 360°.
3. So the whole circle is a sector of 360°.
_Source: NCERT Class 10 Mathematics, Chapter 11 Areas Related to Circles, 11.1_
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