1.

Find the area of a the shaded portion , given R= 4.5cm and r=2.5cm​

Answer»

ong>Step-by-step EXPLANATION:

Area of the bigger circle = Pi × R²

Area of the SMALLER circle = Pi × r²

Area of the SHADED REGION = Area of bigger circle - smaller circle

= Pi × R² - Pi × r²

= Pi ( R² - r² )

= 22/7 × (4.5² - 2.5²) cm²

= 22/7 × ( 20.25 - 6.25) cm²

= 22/7 × 14 cm²

= 44 cm²



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