We want to find the area of a hubcap of a tire with circumference of 81.58 centimeters. Remember that the area of a circle with radius r is calculated using the formula below.
A=Ï€ r^2
Here, r is the radius of the circle. To find the area, we need to start by finding the value of the radius of the circle. Since the circumference is 81.58cm, we can use the formula for the circumference to find the radius of the circle.
C=2Ï€ r
We will substitute 16.3 for C in the formula and solve the resulting equation for r. We will use 3.14 for π.
Are you interested in learning more about circles? Our Mathleaks original content can teach you all about them! Check out the following resources to see real-world uses for circumference and area, how circles compare to other shapes and why, as well as some higher level topics that you can look forward to learning about in Geometry and Algebra 2.
