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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.
- Area of a Sector
Area of a sector formula: Area of a sector =...
- Parts of a Circle
What are the parts of a circle? The parts of a circle are...
- Equation of a Circle
Equation Of A Circle. Here we will learn about the equation...
- Arc Length
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
The formula for the area of a circle is A = πr 2, where r is the radius of the circle. The unit of area is the square unit, for example, m 2, cm 2, in 2, etc. The area of a circle formula is useful for measuring the region occupied by a circular field or a plot.
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.
Area of a Circle Practice Problems with Answers. 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. Round your final answer to two decimal places unless the exact answer is required.
Circle area formula is π x r^2 (r squared). For finding circumference, you need to know the radius or diameter. Practice problems on how to calculate circumference, area from the circle worksheets here and use other resources of this page to improve your skills.
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)
16 wrz 2022 · The area of a circle can be determined using the radius or diameter of the circle. Suppose a circle has a radius ‘r’, then the area of the circle is given by πr2 . If the diameter is given, then the area of the circle is given by πd2/4 in square units. Where π = 22 / 7or 3.14.
