Question

Find the area of the regular polygon. Round your answer to the nearest tenth.A.



40.0 in.2


B.



220.5 in.2


C.



67.6 in.2


D.



110.2 in.2

Answer 1

how do i find the apothem? in order to do this..

Answer 2

use pythogorean theorom to find height.

then area of one triangle would be h*b=h*4

since there are 10 triangles multiply it by 10

Answer 3

so would it be 5.5?

Answer 4

the apothem?

Answer 5

oops in my formulas it shoule be h*b*.5 not h*b lol

Answer 6

in noticed. ha but would that be the apothem? or no

Answer 7

i*

Answer 8

5.511451714
is apothem

Answer 9

6.81^2 = 4^2+x^2 solve for x

i got it from phytogorean theorom

Answer 10

so yes 5.5 :)

Answer 11

yeah thats how i got it too. but then the regular polygon formula is A=1/2ap isnt it?

Answer 12

as timo86m said to get the area= 1/2 bh where your base is b=4 and h=5.5
so what will you get ???
then there are 10 triangles as mention the area you will get multiply it by 10

Answer 13

5.511451714 this is the height that you will use
xD