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Circle Solver
Can't remember the formulas for the other two parts of a circle (area, diameter, or circumference) when you only know one? To the rescue is Circle Solver. Enter the circle area, diameter, or circumference and it will solve for the other two! Great!
Area:
Diameter:
Circumference:
Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Original: Chris Brown --> <!-- Web Site: http://www.geocities.com/BourbonStreet/3843 --> <!-- Begin function circle(form,changed) { with (Math) { var area = form.area.value; var diameter = form.diameter.value; var circumference = form.circumference.value; if (changed == "area") { var radius = sqrt(area / PI); diameter = 2 * radius; circumference = PI * diameter; } if (changed == "diameter") { area = PI * (diameter / 2) * (diameter / 2); circumference = PI * diameter; } if (changed == "circumference") { diameter = circumference / PI; area = PI * (diameter / 2) * (diameter / 2); } form.area.value = area; form.diameter.value = diameter; form.circumference.value = circumference; } } var toDegrees = 360 / (Math.PI * 2); var toRadians = (Math.PI * 2) / 360; // End --> </script>
Insert into <BODY>
<center> <form method=post> <table border="5"> <tr> <td align=center>Area:</td> <td align=center><input type=text name=area size=6 value=0 onFocus="select()"></td> <td align=center><input type=button value="Solve Others" onClick="circle(this.form,'area')"></td> </tr> <tr> <td align=center>Diameter:</td> <td align=center><input type=text name=diameter size=6 value=0 onFocus="select()"></td> <td align=center><input type=button value="Solve Others" onClick="circle(this.form,'diameter')"></td> </tr> <tr> <td align=center>Circumference:</td> <td align=center><input type=text name=circumference size=6 value=0 onFocus="select()"></td> <td align=center><input type=button value="Solve Others" onClick="circle(this.form,'circumference')"></td> </tr> </table> </form> </center>
Other Options
