How to Calculate the Area of a Circle Using Radius
Learn the method to find the area of a circle when the diameter isn't available, using just the radius or circumference.
176 views
To find the area of a circle without the diameter, you can use the radius. The formula is A = πr², where 'A' is the area and 'r' is the radius. If you only have the circumference (C), you can find the radius by using the formula r = C / (2π). Once you have the radius, you can then substitute it into the area formula.
FAQs & Answers
- What is the formula for the area of a circle? The area of a circle is given by the formula A = πr², where 'A' is the area and 'r' is the radius.
- How do you find the radius of a circle from its circumference? You can find the radius by using the formula r = C / (2π), where 'C' is the circumference of the circle.
- Can I calculate the area of a circle without knowing the diameter? Yes, you can calculate the area if you know the radius or circumference of the circle.
- Why is the radius important in circle calculations? The radius is essential because it is the key measurement needed to calculate the area and other properties of a circle.