# the ordered pairs of points that represent corners of an octagon

• Dec 3rd 2010, 04:41 AM
mwp141
the ordered pairs of points that represent corners of an octagon
List the ordered pairs of points that represent corners of an octagon
• Dec 3rd 2010, 04:46 AM
Plato
Please post the exact and complete wording of this question.
As stated, it is far too vague to attempt giving an answer.
• Dec 3rd 2010, 04:52 AM
Soroban
Hello, mwp141!

Quote:

$\text{List the ordered pairs of points that represent corners of an octagon.}$

Plato is absolutely right . . .

With no further information, here is an acceptable answer:

. . $(x_1,y_1),\;(x_2,y_2),\;(x_3,y_3),\;(x_4,y_4),\;(x _5,y_5),\;(x_6,y_6),\;(x_7,y_7),\;(x_8,y_8)$

• Dec 3rd 2010, 06:38 AM
mwp141
Draw an object consisting entirely of straight lines . These are all symmetrical objects. Avoid drawing a rectangle or triangle. List the pairs of the points that represent corners of your object. My object is an octagon.
• Dec 3rd 2010, 06:47 AM
Plato
Quote:

Originally Posted by mwp141
Draw an object consisting entirely of straight lines . These are all symmetrical objects. Avoid drawing a rectangle or triangle. List the pairs of the points that represent corners of your object. My object is an octagon.

You could have saved us all time if you had done that to begin with.
A regular octagon centered at the origin and ‘radius’ one has vertex coordinates of:
$\left\{ {\left( {\cos \left( {\frac{\pi }{8} + \frac{{k\pi }}
{4}} \right),\sin \left( {\frac{\pi }{8} + \frac{{k\pi }}{4}} \right)} \right):k = 0,1, \cdots ,7} \right\}$
.