Question

What is the area of the regular octagon below?

Answer 1

@sleepyjess

Answer 2

about 229.102597104441

Answer 3

@skyloft0629 could you please explain how you got to that? Direct answers are against the Code of Conduct :)

Answer 4

Or we can work it out together @lsDxMdmaddicThc :)

Answer 5

oh

Answer 6

im a newb

Answer 7

I see :) Welcome to OpenStudy!

Answer 8

i multiplied the the 2 radius and the sine of the angle and multiplied that by 8 then divided by 2

Answer 9

My approach would be to find the apothem using \(apothem = r cos(\dfrac{180}n)\) then find side/2 using the pythagorean theorem, then multiply side/2 by 2 to get the side, then use the area formula

Answer 10

I would like to work it out together

Answer 11

Okay, so the formula I gave was to find the apothem, given the radius

Answer 12

What is the n in the equation?

Answer 13

I'm not the best at drawing, so bear with me :)

Answer 14

n is the number of sides

Answer 15

Okay so Apothem = 8.31m

Answer 16

Yep, now we can find side/2 using the Pythagorean Theorem

Answer 17

A(sq) + B(sq) = C(sq)?