Source Code for Geometric Properties Form

<SCRIPT TYPE="text/javascript">
<!--
function Circle_calc(GeoForm)
{
var CircleRadius = GeoForm.Circle_radius.value;
if (CircleRadius >= 0)
{
GeoForm.Circle_circumference.value =  2 * Math.PI * CircleRadius ;
GeoForm.Circle_area.value =  Math.PI * Math.pow(CircleRadius, 2) ;
}
else
{
GeoForm.Circle_circumference.value =  "";
GeoForm.Circle_area.value =  "";
}
}
function Cone_calc(GeoForm)
{
var ConeRadius = GeoForm.Cone_radius.value;
var ConeHeight = GeoForm.Cone_height.value;
if ((ConeRadius >= 0) && (ConeHeight >= 0))
{
GeoForm.Cone_surfacearea.value = (Math.PI * Math.pow(ConeRadius, 2)) + (Math.PI * ConeRadius * Math.sqrt(Math.pow(ConeRadius, 2) + Math.pow(ConeHeight, 2)));
GeoForm.Cone_volume.value = (1/3) * Math.PI * Math.pow(ConeRadius,2) * ConeHeight;
}
else
{
GeoForm.Cone_surfacearea.value = "";
GeoForm.Cone_volume.value = "";
}
}
function Sphere_calc(GeoForm)
{
var SphereRadius = GeoForm.Sphere_radius.value;
if (SphereRadius >= 0) 
{
GeoForm.Sphere_surfacearea.value = 4 * Math.PI * Math.pow(SphereRadius, 2);
GeoForm.Sphere_volume.value = (4/3) * Math.PI * Math.pow(SphereRadius, 3);
}
else
{
GeoForm.Sphere_surfacearea.value = "";
GeoForm.Sphere_volume.value = "";
}
}
// -->
</SCRIPT>
<FORM>
<TABLE BORDER CELLPADDING=3>
<!-- circumference and radius of a circle -->
<TR>
<TH>Circumference and Radius of a Circle<BR><IMG SRC="../graphics/circle.gif" HEIGHT=88 WIDTH=88 ALT="picture of a circle"></TH>
<TD><NOBR>radius: <INPUT NAME="Circle_radius" SIZE=4></NOBR></TD>
<TD><INPUT TYPE=BUTTON OnClick="Circle_calc(this.form);" VALUE="calculate"></TD>
<TD ALIGN=RIGHT BGCOLOR="#AACCFF">
<NOBR>circumference: <INPUT NAME="Circle_circumference" SIZE=9></NOBR><BR>
<NOBR>area: <INPUT NAME="Circle_area" SIZE=9></NOBR></TD>
</TR>
<!-- Surface area and volume of a cone -->
<TR>
<TH>Surface Area and Volume of a Cone<BR><IMG SRC="../graphics/cone.gif" HEIGHT=106 WIDTH=115 ALT="picture of a cone"></TH>
<TD ALIGN=RIGHT><NOBR>radius: <INPUT NAME="Cone_radius" SIZE=4></NOBR><BR>
<NOBR>height: <INPUT NAME="Cone_height" SIZE=4></NOBR></TD>
<TD><INPUT TYPE=BUTTON OnClick="Cone_calc(this.form);" VALUE="calculate"></TD>
<TD ALIGN=RIGHT BGCOLOR="#AACCFF">
<NOBR>surface area: <INPUT NAME="Cone_surfacearea" SIZE=9></NOBR><BR>
<NOBR>volume: <INPUT NAME="Cone_volume" SIZE=9></NOBR></TD>
</TR>
<!-- Surface Area and Volume of a Sphere -->
<TR>
<TH>Surface Area and Volume of a Sphere<BR><IMG SRC="../graphics/sphere.gif" HEIGHT=88 WIDTH=88 ALT="picture of a sphere"></TH>
<TD><NOBR>radius: <INPUT NAME="Sphere_radius" SIZE=4></NOBR></TD>
<TD><INPUT TYPE=BUTTON OnClick="Sphere_calc(this.form);" VALUE="calculate"></TD>
<TD ALIGN=RIGHT BGCOLOR="#AACCFF"><NOBR>surface area: <INPUT NAME="Sphere_surfacearea" SIZE=9></NOBR><BR>
<NOBR>volume: <INPUT NAME="Sphere_volume" SIZE=9></NOBR></TD>
</TR>
</TABLE>
</FORM>

which gives us this form:

Circumference and Radius of a Circle	radius:		circumference: area:
Surface Area and Volume of a Cone	radius: height:		surface area: volume:
Surface Area and Volume of a Sphere	radius:		surface area: volume: