Question

What is the perimeter of a regular octagon with a radius of length 20?

Answer 1

you just add all the lengths of the octagon

Answer 2

@raane okay what do i do after that?

Answer 3

how many sides does octagon has

Answer 4

using sine ratio, you can get the value of \(a/2\).
the perimeter = \(8\times a\)

Answer 5

@lana.831 you should say "circumradius" otherwise everybody here got confused. I hope that is what you meant,

Answer 6

here's the figure

Answer 7

are you finding the perimeter of that figure??

Answer 8

23

Answer 9

then what did you mean by radius? you have to provide all the information when you ask for a question

Answer 10

that's the question..
What is the perimeter of a regular octagon with a radius of length 20?

Answer 11

then what has the figure you've posted got anything to do with this?

Answer 12

the polygon you showed is a "heptagon" with 7-sides

Answer 13

nevermind. lol

Answer 14

ok. coming back to the "regular octagon", you can find "a" using the above steps, right?

Answer 15

@lana.831 your answer for the perimeter is right if you are referring to the shape you posted......

Answer 16

lol