Question

find the perimeter of the half circle. Diameter is 40. show me the steps on how to get this.

Answer 1

\[P_{o}=2 \pi r ~~~~or~~~~P_{o}=\pi d\]\[P_{o}=40 \pi\]\[P_{o}\approx 125.6\]\[half~of~total~perimeter={125.6\over2}\]\[\huge =62.8\]

Answer 2

next you need to add the diameter

Answer 3

i did that i got 102.83ft

Answer 4

\[\huge 62.8+40=102.8\]

Answer 5

Great! :D

Answer 6

but my teacher posted a different answer for it, she must have been wrong

Answer 7

thanks. i will question her about it tomorrow :)

Answer 8

maybe you have to round to a certain place :)

Answer 9

cool glad i could help :)

Answer 10

no she gotv165.66ft

Answer 11

oh...well then im not sure where she got that....be sure to question her to clear this up :)