a pentagon is 5 sides.... an octogon is 8 sides... what is 10 sides?? or is there such a thing??
2006-11-05 07:57:23 · 11 answers · asked by don e 1 in Science & Mathematics ➔ Mathematics
A decagon :
http://en.wikipedia.org/wiki/Image:Decagon.svg
Here is the method to constuct it (you have to construct a pentagon in the beginning) :
1. Draw a circle in which to inscribe the pentagon and mark the center point O. (This is the green circle in the diagram to the right).
2. Choose a point A on the circle that will serve as one vertex of the pentagon. Draw a line through O and A.
3. Construct a line perpendicular to the line OA passing through O. Mark its intersection with one side of the circle as the point B.
Construct the point C as the midpoint of O and B.
4. Draw a circle centered at C through the point A. Mark its intersection with the line OB (inside the original circle) as the point D.
5. Draw a circle centered at A through the point D. Mark its intersections with the original (green) circle as the points E and F.
6. Draw a circle centered at E through the point A. Mark its other intersection with the original circle as the point G.
7. Draw a circle centered at F through the point A. Mark its other intersection with the original circle as the point H.
8. Construct the regular pentagon AEGHF.
9. Extend a line from each corner of the pentagon through the center of the circle made in step 1 of constructing a pentagon to the opposite side of that same circle.
10. The five corners of the pentagon constitute every other corner of the decagon. The remaining five corners of the decagon are those points where the lines of step 2 cross the original circle (but not a pentagon corner).
2006-11-05 07:59:02 · answer #1 · answered by Kristian 3 · 0⤊ 0⤋
Decagon
2006-11-05 07:59:50 · answer #2 · answered by ? 7 · 0⤊ 0⤋
A decagon.
2006-11-05 07:58:44 · answer #3 · answered by Amy F 5 · 0⤊ 0⤋
decagon - a polygon having ten angles and ten sides.
A decahedron is a solid figure having ten faces.
A dodecahedron is a solid figure having 12 faces.
2006-11-05 08:01:52 · answer #4 · answered by misskate12001 6 · 0⤊ 0⤋
It's a decagon.
2006-11-05 08:36:22 · answer #5 · answered by steiner1745 7 · 0⤊ 0⤋
decagon
2006-11-05 08:04:47 · answer #6 · answered by fattygoeshome 1 · 0⤊ 0⤋
decagon
2006-11-05 08:04:17 · answer #7 · answered by Anonymous · 0⤊ 0⤋
decagon
2006-11-05 08:00:11 · answer #8 · answered by kiyomidog 2 · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Decahedron
2006-11-05 08:00:14 · answer #9 · answered by kevingizmos 1 · 0⤊ 0⤋
A decahedron, I think.
PS: Oops, wrong. Well, I did say 'I think'. :)
2006-11-05 07:59:53 · answer #10 · answered by langdonrjones 4 · 0⤊ 0⤋