Question

Find the perimeter of a semicircular plate of radius 3.85 cm.
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Answer 1

Answer:

12.089 cm

Step-by-step explanation:

Perimeter of circle =  

Where r = radius

Perimeter of semicircle =  =  

We are given the radius of length 3.85 cm

Thus the perimeter of semi circular plate =  

                                                                   =  

Hence the perimeter of semi circular plate is 12.089 cm

Answer 2

Answer:

Radius = 3.85cm

Circumference(perimeter) of a full circle = 2πr(π = 3.14 or 22÷7)

2×22/7×3.85

=24.2

Circumference of semi circle = 24.2 ÷ 2

= 12.1 (12)

Step-by-step explanation:

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