Explanation:
The angle of the minor sector will be ,
> 360 - 270= 90° .
Area of sector :-
> Area = ∅ / 360 × πr²
> A = 90/360 × 3.14 × (4cm)²
> A = 1/4 × 3.14 × 16 cm²
> A = 12.56 cm²
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