A regular decagon and a regular pentagon have perimeters of the same length. If the length of a side of the pentagon is 8 meters, what is the length of each side of the decagon?
A. 5 m
B. 4 m
C. 6.3 m
D. 16 m
2007-04-14 16:33:12 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
B. The pentagon has perimeter of 8*5 = 40. The decagon has 10 sides, so each side has length 40/10 = 4.
2007-04-14 16:39:03 · answer #1 · answered by jenh42002 7 · 0⤊ 0⤋
This isn't surface area and volume, but easier for all of us then!
Decagon has 10 sides, pentagon 5. Therefore, the pentagon's perimeter is 5*8 = 40. That would make the side of a decagon equal to 40/10 sides = 4. {B}
2007-04-14 23:43:03 · answer #2 · answered by Kathleen K 7 · 0⤊ 0⤋
pentagon 5 sides times 8 each side is total of 40 m
decagon is 10 sides Perimeter divided by 10
40/10 = 4m
:)
2007-04-14 23:39:19 · answer #3 · answered by Anonymous · 0⤊ 0⤋
as u said regular, it should
B. 4m
2007-04-14 23:38:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋