Math, 15.05.2020tayis

The figure shows three semicircles. Find
(I) the perimeter
(ii) the area,
of the shaded region


The figure shows three semicircles. Find  (I) the perimeter (ii) the area, of the shaded region

Answers

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1) 87.92 cm

2) 615.44cm

Step-by-step explanation:

Circumference (C) = 2πr = πd (d=2r)

Area (A) = πr²

Use π ≈ 3.14

1. Given that d=28cm, substitute the given value for diameter to the formula for circumference:

⇒ C = (3.14)(28) cm = 87.92cm

2. Given that d=28cm, substitute the given value of diameter to the formula for finding the radius:

⇒ r = (½)(28) cm = 14cm

Then substitute the value of radius to the formula for area:

⇒ A = (3.14)(14)² cm = (3.14)(196) cm = 615.44cm



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