Question

can anyone help me?

http://www.rmes.us/AngelUploads/Content/MAT201//_assoc/Content/G%20Images/u2m8q1.jpg

If a regular pentagon has an apothem approximately 5.5 in. long and a side 8 in. long, what is its area?
A) 110 in.2
B) 220 in.2
C) 70 in.2
D) 150 in.2

Answer 1

i think is D not sure if it right?!

Answer 2

There is a formula for that.

Answer 3

oh do u know a wed site that i can check it out!? please!

Answer 4

cuz right now i'm work on Area: Regular Polygons and i just don't get it

Answer 5

I found it on an my old formula chart.
A=(1/2)aP
a is apthem and P is perimeter

Answer 6

A=(1/2)(5.5)(40)
A=110

Answer 7

so did u like X it all or something!?

Answer 8

yes multiply all three numbers

Answer 9

AWWWWW!!! kk so if i had like this
http://www.rmes.us/AngelUploads/Content/MAT201//_assoc/Content/G%20Images/u2m8q3.jpg

What is the approximate area of a regular decagon with an apothem ≈ 30.8' and a side = 20'?
A) 6160 ft.2
B) 1530 ft.2
C) 3080 ft.2
D) 2050 ft.2

Answer 10

i would have to do (30.8)(20) ? right

Answer 11

X

Answer 12

and this one would be A?! right!?

Answer 13

No because the formula is only for the regular polygon. Sorry I had to go do something.

Answer 14

you might want to google area formula for a regular decagon.

Answer 15

it kk : / is there a web site so i can look at that can help me on this stuff....?

Answer 16

ok I am not understanding you what is kk:/

Answer 17

http://www.learner.org/interactives/geometry/
try this website
You might want to post your second questions separately.
Good luck :)

Answer 18

oh thank u it help a little thank u!