Find the area of the shaded region, if the bigger diameter is 12 cm and the smaller diameter is 8 cm.
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Answer:
101.2
Step-by-step explanation:
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Step-by-step explanation:
Im sure, there must be a smaller circle, inside a shaded circle which isn't shaded.
D= 12cm (bigger circle)
R= 6cm
d= 8cm ( smaller circle)
r= 4cm
area of a shaded region= area of the bigger circle- area of a smaller circle.
= πR²-πr²
=π(R²-r²)
=22/7 [(6cm)²-(4cm²)]
= 22/7 (36cm²-16cm²)
= 22/7 × 20cm²
= 3.14×20cm²
= 62.8cm²
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