Write the formula down. Use the formula πr2to find the area of a circle. To understand what the formula means, you need to understand the variables. Pi, written as π, approximately equals (22÷7), usually rounded to 3.14. Pi is a universal constant that shows up naturally in calcula...
Determining the square feet of a circular pool is the same as determining the area of a circle. Calculate the area of a pool so you'll know how much land a round pool will take up on your property. The formula for calculating the area of a circle is pi times radius squared. Measure ...
such as square inches or square centimeters. To find the area of the circle, you only need to know the radius. The radius is the distance from the center of the circle to any point on the circle. Since all points on a circle are equidistant, it doesn't matter which point on ...
More Examples of Calculating Area Area of a Square The length and width of a square are the same so we just need to multiply the length by the length. Area of a Circle The area of a circle = πr2 where r is the radius of the circle and π is the ratio of a circle’s circumfer...
This gives you the area of the space in square feet. You can also use this formula to calculate smaller areas when the area will be expressed in square inches and larger areas in square yards. As an example, suppose you want to know how much flooring you might need to renovate a room...
Next, there are two simple ways to calculate the diameter of a hexagon. Measure the side length and multiply it by 2. Multiply the radius by 2. (The distance from the intersection of the two sides to the center is called the radius.) ...
Draw a perfect square around the circle. Step 3 Calculate the area of the square, and divide that by the surface area of the facing-out side of a brick. This method yields a ceiling estimate of the number of bricks you will need. You are not making allowances for the space needed for...
Discover how to find the area and circumference of a circle. Learn the area of a circle formula, the circumference of a circle formula, how to calculate the circumference of a circle, and how to calculate the area of a circle. Related...
To calculate the volume of a cylinder, one must know the height and radius (the distance between the edge of the circle and its centre point) of one of the flat ends. If the dimensions are given in cm, the volume is measured cubic cm (cm3). Though you can also measure the volume ...
A = 56.72 square centimeters You can also calculate the area if a circle if you know the radius. So, if you have a radius of 4.5 inches: A = π * 4.5^2 A = 3.14 * (4.5 * 4.5) A = 3.14 * 20.25 A = 63.585 (which rounds to 63.56) ...