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Create program to find area of Triangle using inheritance.

Solution:

<?php  
    class getdata  
    {  
        public $h;  
        public $b;  
        public function method1()  
        {  
            $this->h= $_REQUEST['height'];  
            $this->b= $_REQUEST['base'];  
        }  
  
    }  
    classfindarea extends getdata  
    {  
        public $area;  
        public function method2()  
        {  
            $this->area= ($this->h* $this->b)/2;  
            echo "Area of Triangle is : ".$this->area;  
        }  
    }  
    if(isset($_REQUEST['submit']))  
    {  
        $obj = new findarea();  
        $obj->method1();  
        $obj->method2();  
    }  
  
      
?>  
<html>  
<head>  
</head>  
<body>  
    <form method= "post">  
        <table align ="left" border="1">  
        <tr>  
            <td> Enter Height </td>  
            <td><input type = "text" name="height"/></td>  
        </tr>  
        <tr>  
            <td> Enter Base </td>  
            <td><input type = "text" name="base"/></td>  
        </tr>  
        <tr>  
            <td align ="center" colspan="2">  
            <input type= "submit"name="submit"value="click"/>  
        </td>  
        </tr>  
        </table>  
        </form>  
</body>  
</html>

Output:

Inheritance Task
Inheritance Task
Inheritance Task
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