More Lessons for GCSE Maths

Math Worksheets

Videos and solutions to help GCSE Maths students learn how to solve word problems involving circles.

Doubling the Radius and Its Effect on Circumference

Just what happens to a circles circumference when you double the radius anyway?

Change the radius to see what relationship occurs between the old and new circle areas.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.