Question

Find the difference of the areas of a sector of angle 120° and its corresponding
major sector of a circle of radius 21 cm.
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Answer 1

consider the areas A,B

$A = (120°/360°)* \pi r^{2}$

$B = \pi r^{2} - (120°/360°)* \pi r^{2}$

difference in areas, B-A = 
$B-A = \pi r^{2} - (120°/360°)* \pi r^{2} - (120°/360°)* \pi r^{2}$
=462 cm²

Answer 2

Step-by-step explanation:

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