Calculators Effects >>> Polygon.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		side(form)
		{

		var 
		n =
		document.form1.n.value;

		document.form1.n.value
		= 
		n;

		document.form1.intx.value
		=
		((n
		-
		2)
		*
		180)
		/ 
		n;

		document.form1.ext.value
		=
		180
		-
		document.form1.intx.value;

		}

		function 
		extn(form)
		{

		var 
		e =
		document.form1.ext.value;

		document.form1.n.value
		=
		360
		/ 
		e;

		document.form1.intx.value
		=
		180
		- 
		e;

		}

		function 
		intn(form)
		{

		var 
		i =
		document.form1.intx.value;

		document.form1.ext.value
		=
		180
		- 
		i;

		document.form1.n.value
		=
		360
		/
		(180
		- 
		i);

		}

		//  End -->

		</script>

		The sum of the measures of the angles of 
		a convex polygon with <i>n</i> 
		sides is <b>(<i>n</i> 
		- 2)180.</b><br>

		<br>

		<form
		name="form1">

		<table
		width="500"
		border="1">

		<tr>

		<td 
		width="45%">

		Sides on the polygon:</td>

		<td><input
		name="n"></td>

		<td><input
		type="button"
		value=" 
		Find " 
		onClick="side(this.form)"></td></tr>

		<tr>

		<td 
		width="35%">

		Measure of each exterior angle:</td>

		<td><input
		name="ext"></td>

		<td><input
		type="button"
		value=" 
		Find " 
		onClick="extn(this.form)"></td></tr>

		<tr>

		<td 
		width="20%">

		Measure of each interior angle:</td>

		<td><input
		name="intx"></td>

		<td><input
		type="button"
		value=" 
		Find " 
		onClick="intn(this.form)"></td></tr>

		</table>

		</form>