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Here we will learn about using the formula \pi r^2 (pi r squared) to calculate the area of a circle given the radius, diameter or the circumference. There are also worksheets based on Edexcel, AQA and OCR exam questions, along with further guidance on where to go next if you’re still stuck.
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Equation Of A Circle. Here we will learn about the equation...
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Arc Length. Here we will learn about calculating arc length...
- Circumference of a Circle
Example 1: calculating the circumference of the circle given...
- Perimeter of a Sector
Perimeter Of A Sector. Here we will learn about calculating...
- Surface Area of a Sphere
Write down the formula. To answer the question we need to...
- Circle Theorems
Here we will learn about circle theorems, including their...
- Area of a Sector
In order to calculate the area of a circle: Find the radius of the circle. Use the formula Area of a circle=πr2. Area of a circle = π r 2 \text {Area of a circle} = \pi r^2. Area of a circle = πr2 to calculate the area of the circle. Give your answer clearly with the correct units.
Area of a circle can be calculated by using the formulas: Area = π × r 2, where 'r' is the radius. Area = (π/4) × d 2, where 'd' is the diameter. Area = C 2 /4π, where 'C' is the circumference (sometimes referred to as perimeter). Examples using Area of Circle Formula. Let us consider the following illustrations based on the area of circle ...
There are twelve (12) practice problems in this exercise about the area of the circle. You may use a calculator. Do not round intermediate calculations. For your convenience, I have included the different variations of formulas that you can use to find the area of a circle.
Understand that you can easily determine the area of a circle using the formula Area = π × r^2, where π is approximately 3.14, and r represents the radius of the circle. Note that radius is half the diameter of a circle.
How to Calculate the Area. The area of a circle is: π(Pi) times the Radius squared:A = πr2. or, when you know the Diameter:A = (π/4) × D2. or, when you know the Circumference:A = C2/ 4π. Example: What is the area of a circle with radius of 3 m ? Radius = r = 3. Area= πr2. = π× 32. = 3.14159... × (3 × 3) = 28.27 m2(to 2 decimal places)
The formula for the area of a circle (A) using its radius r is as follows: A = πr 2. Example: A circle has a radius of 5 inches. Find the area of the circle.
