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Determine the area of ​​the annulus if: R = 4cm; r = 2cm.

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Answer:

Annulus

Solve for area

A≈37.7cm²

R Outer radius

4

cm

r Inner radius

2

cm

Solution

A=π(R2﹣r2)=π·(42﹣22)≈37.69911cm²

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