Question

what is the circumference of semicircle if the circumference of circle is 30.8?

Answer 1

Answer:

15.4 is the semicircle's circumference

Step-by-step explanation:

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Answer 2

Assuming that the semicircle also has a diameter

Answer:    25.2

Step-by-step explanation:

Circumference = 30.8

30.8 = 2πr = 44/7 radius

154/5 ÷ 44/7 = radius

4.9 = radius

2radius = 9.8      

diameter = 9.8

circumference of semicircle = 9.8 + (30.8/2) = 9.8 + 15.4 = 25.2

Assuming that the semicircle does not have a diameter

Answer: 15.4

Step-by-step explanation:

Circumference of circle = 30.8

Circumference of semicircle = 30.8/2 = 15.4