Question

Guys, I seriously don't understand anything in this question . Can anyone please answer this fast?​

Answer 1

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Length = 6r

Radius of senicircles = r

Perimeter of shaded region = 2 * Length + 2 * Circumference of semi circle

Perimeter = 2 * 6r + 2 * π r

= 12r + 2πr

= ( 2r ) ( 6 + π )

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Answer 2

Answer:

Length = 6r

Radius of senicircles = r

Perimeter of shaded region = 2 * Length + 2 * Circumference of semi circle

Perimeter = 2 * 6r + 2 * π r

= 12r + 2πr

= ( 2r ) ( 6 + π )