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- <!DOCTYPE html>
- <html lang="pl">
- <head>
- <meta charset="UTF-8">
- <script type="text/javascript">
- var pole;
- var r2;
- function polekola(){
- var promien2 = document.forms['promien'].promien.value;
- r2 = promien2*promien2;
- pole = 3.141592653589793238462643383279502884197169*r2;
- pole = Math.round(pole * 100) / 100;
- document.write("Pole wynosi: " + pole);
- return false;
- }
- function obwkola(){
- var promien3 = document.forms['promien'].promien.value;
- obw = 2*3.141592653589793238462643383279502884197169*promien3;
- obw = Math.round(obw * 100) / 100;
- document.write("Obwod wynosi: " + obw);
- return false;
- }
- </script>
- </head>
- <body>
- <form id="promien"><div>
- Podaj promien: <input type="text" name="promien"><br>
- <button onclick="polekola()">Oblicz pole</button>
- <button onclick="obwkola()">Oblicz obwód</button>
- </div></form>
- <br><div id="wynik"></div>
- </body>
- </html>
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