Use the formulas to calculate the circumference and area: c = 2πr and A = πr². The circumference should equal c = 2π × 8 cm = 50.265 cm . The area should equal A = π × (8 cm)² = 201.06 cm² .

Feb 18, 2025 · To find the area using the circumference, or the distance around the circle, use the formula area = c^2/4π, where c is the circumference. For example, if the circumference is 42 inches, first you would square 42 and get 1,764.

Calculate the area of a circle given the radius, diameter, or circumference. Plus learn the formulas and steps to find a circle's area.

How to calculate the area or circumference of a circle. In order to calculate the area or circumference of a circle: Find the radius of a circle or the diameter of a circle. Use the relevant formula. Give your answer clearly with the correct units.

Jan 10, 2022 · I this video I will teach you how to calculate the area of a circle with the circumference by following a simple step by step method from a clearly worked e...

To use the area of a circle formula, you need to know the radius of the circle. If you don’t know the radius but know the diameter, you can easily find the radius by dividing the diameter by 2.

We can find the radius of a circle by dividing its area by and then taking the positive square root, as shown by the formula. A = π. A/π = = r. Without knowing the length of the radius, this expression expresses the circumference of a circle as a function of its area.

Apr 24, 2017 · You can solve these problems as long as you know the circle's radius and can do some simple multiplication. If you learn the value of the constant π and the basic equations for a circle's properties, you can quickly find the area or circumference of any circle.