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Severity: 8192
Message: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated
Filename: views/article_profile.php
Line Number: 89
Backtrace:
File: /home/dhakswus/public_html/application/views/article_profile.php
Line: 89
Function: strtotime
File: /home/dhakswus/public_html/application/controllers/Article.php
Line: 193
Function: view
File: /home/dhakswus/public_html/index.php
Line: 315
Function: require_once
The area of a circle
The area of a circle is calculated by different formulas such as:
1. Area of a circle, A= π × r2, where 'r' represents the radius.
2. Area of a circle, A = (π/4) × d2, where 'd' represents the diameter.
3. Area of a circle, A = C2/4π, where 'C' represents the circumference.